From ddfc85444943acb141cf574275a89665f3d67952 Mon Sep 17 00:00:00 2001
From: John Luo <johluo@microsoft.com>
Date: Tue, 17 Sep 2019 22:06:31 -0700
Subject: [PATCH] Update ref assembly generation to use
 DefaultNetCoreTargetFramework property (#14078)

---
 eng/targets/ReferenceAssembly.targets                     | 8 +++++---
 .../ref/Microsoft.AspNetCore.Antiforgery.csproj           | 4 ++--
 .../Microsoft.AspNetCore.Authentication.AzureAD.UI.csproj | 4 ++--
 ...crosoft.AspNetCore.Authentication.AzureADB2C.UI.csproj | 4 ++--
 ...soft.AspNetCore.AzureAppServices.HostingStartup.csproj | 4 ++--
 ...icrosoft.AspNetCore.AzureAppServicesIntegration.csproj | 4 ++--
 .../Microsoft.AspNetCore.Components.Authorization.csproj  | 4 ++--
 .../Server/ref/Microsoft.AspNetCore.Blazor.Server.csproj  | 4 ++--
 .../Components/ref/Microsoft.AspNetCore.Components.csproj | 4 ++--
 .../ref/Microsoft.AspNetCore.Components.Forms.csproj      | 4 ++--
 .../ref/Microsoft.AspNetCore.Components.Server.csproj     | 4 ++--
 .../Web/ref/Microsoft.AspNetCore.Components.Web.csproj    | 4 ++--
 .../ref/Microsoft.AspNetCore.DataProtection.csproj        | 4 ++--
 .../Microsoft.AspNetCore.DataProtection.Extensions.csproj | 4 ++--
 src/DefaultBuilder/ref/Microsoft.AspNetCore.csproj        | 4 ++--
 .../ref/Microsoft.AspNetCore.Hosting.Abstractions.csproj  | 4 ++--
 .../Hosting/ref/Microsoft.AspNetCore.Hosting.csproj       | 4 ++--
 ...icrosoft.AspNetCore.Hosting.Server.Abstractions.csproj | 4 ++--
 .../TestHost/ref/Microsoft.AspNetCore.TestHost.csproj     | 4 ++--
 .../Microsoft.AspNetCore.Hosting.WindowsServices.csproj   | 4 ++--
 .../ref/Microsoft.AspNetCore.Html.Abstractions.csproj     | 4 ++--
 ...icrosoft.AspNetCore.Authentication.Abstractions.csproj | 4 ++--
 .../ref/Microsoft.AspNetCore.Authentication.Core.csproj   | 4 ++--
 src/Http/Headers/ref/Microsoft.Net.Http.Headers.csproj    | 4 ++--
 .../ref/Microsoft.AspNetCore.Http.Abstractions.csproj     | 4 ++--
 .../ref/Microsoft.AspNetCore.Http.Extensions.csproj       | 4 ++--
 .../ref/Microsoft.AspNetCore.Http.Features.csproj         | 4 ++--
 src/Http/Http/ref/Microsoft.AspNetCore.Http.csproj        | 4 ++--
 src/Http/Owin/ref/Microsoft.AspNetCore.Owin.csproj        | 4 ++--
 .../ref/Microsoft.AspNetCore.Routing.Abstractions.csproj  | 4 ++--
 src/Http/Routing/ref/Microsoft.AspNetCore.Routing.csproj  | 4 ++--
 .../ref/Microsoft.AspNetCore.WebUtilities.csproj          | 4 ++--
 .../Core/ref/Microsoft.AspNetCore.Identity.csproj         | 4 ++--
 ...crosoft.AspNetCore.Identity.EntityFrameworkCore.csproj | 4 ++--
 .../ref/Microsoft.Extensions.Identity.Core.csproj         | 4 ++--
 .../ref/Microsoft.Extensions.Identity.Stores.csproj       | 4 ++--
 .../UI/ref/Microsoft.AspNetCore.Identity.UI.csproj        | 4 ++--
 src/Middleware/CORS/ref/Microsoft.AspNetCore.Cors.csproj  | 4 ++--
 .../ref/Microsoft.AspNetCore.ConcurrencyLimiter.csproj    | 4 ++--
 .../Microsoft.AspNetCore.Diagnostics.Abstractions.csproj  | 4 ++--
 ...soft.AspNetCore.Diagnostics.EntityFrameworkCore.csproj | 4 ++--
 .../ref/Microsoft.AspNetCore.Diagnostics.csproj           | 4 ++--
 .../ref/Microsoft.AspNetCore.HeaderPropagation.csproj     | 4 ++--
 .../Microsoft.AspNetCore.Diagnostics.HealthChecks.csproj  | 4 ++--
 .../ref/Microsoft.AspNetCore.HostFiltering.csproj         | 4 ++--
 .../ref/Microsoft.AspNetCore.HttpOverrides.csproj         | 4 ++--
 .../ref/Microsoft.AspNetCore.HttpsPolicy.csproj           | 4 ++--
 .../ref/Microsoft.AspNetCore.Localization.Routing.csproj  | 4 ++--
 .../ref/Microsoft.AspNetCore.Localization.csproj          | 4 ++--
 .../ref/Microsoft.AspNetCore.MiddlewareAnalysis.csproj    | 4 ++--
 .../ref/Microsoft.AspNetCore.NodeServices.csproj          | 4 ++--
 ...crosoft.AspNetCore.ResponseCaching.Abstractions.csproj | 4 ++--
 .../ref/Microsoft.AspNetCore.ResponseCaching.csproj       | 4 ++--
 .../ref/Microsoft.AspNetCore.ResponseCompression.csproj   | 4 ++--
 .../Rewrite/ref/Microsoft.AspNetCore.Rewrite.csproj       | 4 ++--
 .../Session/ref/Microsoft.AspNetCore.Session.csproj       | 4 ++--
 .../Microsoft.AspNetCore.SpaServices.Extensions.csproj    | 4 ++--
 .../ref/Microsoft.AspNetCore.SpaServices.csproj           | 4 ++--
 .../ref/Microsoft.AspNetCore.StaticFiles.csproj           | 4 ++--
 .../WebSockets/ref/Microsoft.AspNetCore.WebSockets.csproj | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.Abstractions.csproj      | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj       | 4 ++--
 src/Mvc/Mvc.Core/ref/Microsoft.AspNetCore.Mvc.Core.csproj | 4 ++--
 src/Mvc/Mvc.Cors/ref/Microsoft.AspNetCore.Mvc.Cors.csproj | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.DataAnnotations.csproj   | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.Formatters.Json.csproj   | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.Formatters.Xml.csproj    | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.Localization.csproj      | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.NewtonsoftJson.csproj    | 4 ++--
 ...crosoft.AspNetCore.Mvc.Razor.RuntimeCompilation.csproj | 4 ++--
 .../Mvc.Razor/ref/Microsoft.AspNetCore.Mvc.Razor.csproj   | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.RazorPages.csproj        | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.TagHelpers.csproj        | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.Testing.csproj           | 4 ++--
 .../ref/Microsoft.AspNetCore.Mvc.ViewFeatures.csproj      | 4 ++--
 src/Mvc/Mvc/ref/Microsoft.AspNetCore.Mvc.csproj           | 4 ++--
 .../ref/Microsoft.AspNetCore.Razor.Runtime.csproj         | 4 ++--
 src/Razor/Razor/ref/Microsoft.AspNetCore.Razor.csproj     | 4 ++--
 ...Microsoft.AspNetCore.Authentication.Certificate.csproj | 4 ++--
 .../Microsoft.AspNetCore.Authentication.Cookies.csproj    | 4 ++--
 .../Core/ref/Microsoft.AspNetCore.Authentication.csproj   | 4 ++--
 .../Microsoft.AspNetCore.Authentication.Facebook.csproj   | 4 ++--
 .../ref/Microsoft.AspNetCore.Authentication.Google.csproj | 4 ++--
 .../Microsoft.AspNetCore.Authentication.JwtBearer.csproj  | 4 ++--
 ...soft.AspNetCore.Authentication.MicrosoftAccount.csproj | 4 ++--
 .../Microsoft.AspNetCore.Authentication.Negotiate.csproj  | 4 ++--
 .../ref/Microsoft.AspNetCore.Authentication.OAuth.csproj  | 4 ++--
 ...crosoft.AspNetCore.Authentication.OpenIdConnect.csproj | 4 ++--
 .../Microsoft.AspNetCore.Authentication.Twitter.csproj    | 4 ++--
 ...icrosoft.AspNetCore.Authentication.WsFederation.csproj | 4 ++--
 .../Core/ref/Microsoft.AspNetCore.Authorization.csproj    | 4 ++--
 .../ref/Microsoft.AspNetCore.Authorization.Policy.csproj  | 4 ++--
 .../ref/Microsoft.AspNetCore.CookiePolicy.csproj          | 4 ++--
 .../Microsoft.AspNetCore.Connections.Abstractions.csproj  | 4 ++--
 .../ref/Microsoft.AspNetCore.Server.HttpSys.csproj        | 4 ++--
 .../IIS/IIS/ref/Microsoft.AspNetCore.Server.IIS.csproj    | 4 ++--
 .../ref/Microsoft.AspNetCore.Server.IISIntegration.csproj | 4 ++--
 .../ref/Microsoft.AspNetCore.Server.Kestrel.Core.csproj   | 4 ++--
 .../ref/Microsoft.AspNetCore.Server.Kestrel.csproj        | 4 ++--
 ...osoft.AspNetCore.Server.Kestrel.Transport.Libuv.csproj | 4 ++--
 ...oft.AspNetCore.Server.Kestrel.Transport.Sockets.csproj | 4 ++--
 .../Microsoft.AspNetCore.Http.Connections.Common.csproj   | 4 ++--
 .../ref/Microsoft.AspNetCore.Http.Connections.csproj      | 4 ++--
 .../Microsoft.AspNetCore.SignalR.Protocols.Json.csproj    | 4 ++--
 .../ref/Microsoft.AspNetCore.SignalR.Common.csproj        | 4 ++--
 .../Core/ref/Microsoft.AspNetCore.SignalR.Core.csproj     | 4 ++--
 .../SignalR/ref/Microsoft.AspNetCore.SignalR.csproj       | 4 ++--
 ...Microsoft.AspNetCore.SignalR.StackExchangeRedis.csproj | 4 ++--
 108 files changed, 219 insertions(+), 217 deletions(-)

diff --git a/eng/targets/ReferenceAssembly.targets b/eng/targets/ReferenceAssembly.targets
index 46225a45e1..f516f1b07a 100644
--- a/eng/targets/ReferenceAssembly.targets
+++ b/eng/targets/ReferenceAssembly.targets
@@ -47,6 +47,8 @@
     <PropertyGroup>
       <_RefSourceFileTFM>$(TargetFramework)</_RefSourceFileTFM>
       <_RefSourceFileTFM Condition="$(TargetFramework.StartsWith('netcoreapp'))">netcoreapp</_RefSourceFileTFM>
+      <_RefProjectFileTFM>$(TargetFramework)</_RefProjectFileTFM>
+      <_RefProjectFileTFM Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">%24(DefaultNetCoreTargetFramework)</_RefProjectFileTFM>
 
       <_RefSourceOutputPath>$([System.IO.Directory]::GetParent('$(MSBuildProjectDirectory)'))/ref/</_RefSourceOutputPath>
       <_RefSourceFileName>$(AssemblyName).$(_RefSourceFileTFM).cs</_RefSourceFileName>
@@ -81,7 +83,7 @@
     <PropertyGroup>
       <ReferencesContent>
       <![CDATA[
-  <ItemGroup Condition="'%24(TargetFramework)' == '$(TargetFramework)'">
+  <ItemGroup Condition="'%24(TargetFramework)' == '$(_RefProjectFileTFM)'">
     <Compile Include="$(_RefSourceFileName)" />
     @(FilteredOriginalReferences->'<Reference Include="%(Identity)"  />', '%0A    ')
   </ItemGroup>
@@ -90,8 +92,8 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <ProjectListContent Include="$(ReferencesContent)" TargetFramework="$(TargetFramework)" />
+      <ProjectListContent Include="$(ReferencesContent)" TargetFramework="$(_RefProjectFileTFM)" />
     </ItemGroup>
   </Target>
 
-</Project>
+</Project>
\ No newline at end of file
diff --git a/src/Antiforgery/ref/Microsoft.AspNetCore.Antiforgery.csproj b/src/Antiforgery/ref/Microsoft.AspNetCore.Antiforgery.csproj
index 68cfe098f3..19cd7ed436 100644
--- a/src/Antiforgery/ref/Microsoft.AspNetCore.Antiforgery.csproj
+++ b/src/Antiforgery/ref/Microsoft.AspNetCore.Antiforgery.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Antiforgery.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.DataProtection"  />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
diff --git a/src/Azure/AzureAD/Authentication.AzureAD.UI/ref/Microsoft.AspNetCore.Authentication.AzureAD.UI.csproj b/src/Azure/AzureAD/Authentication.AzureAD.UI/ref/Microsoft.AspNetCore.Authentication.AzureAD.UI.csproj
index 5f8239fc10..85033065e4 100644
--- a/src/Azure/AzureAD/Authentication.AzureAD.UI/ref/Microsoft.AspNetCore.Authentication.AzureAD.UI.csproj
+++ b/src/Azure/AzureAD/Authentication.AzureAD.UI/ref/Microsoft.AspNetCore.Authentication.AzureAD.UI.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.AzureAD.UI.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc"  />
     <Reference Include="Microsoft.AspNetCore.Authentication.JwtBearer"  />
diff --git a/src/Azure/AzureAD/Authentication.AzureADB2C.UI/ref/Microsoft.AspNetCore.Authentication.AzureADB2C.UI.csproj b/src/Azure/AzureAD/Authentication.AzureADB2C.UI/ref/Microsoft.AspNetCore.Authentication.AzureADB2C.UI.csproj
index 99f8903d8c..7bcd1a5e1b 100644
--- a/src/Azure/AzureAD/Authentication.AzureADB2C.UI/ref/Microsoft.AspNetCore.Authentication.AzureADB2C.UI.csproj
+++ b/src/Azure/AzureAD/Authentication.AzureADB2C.UI/ref/Microsoft.AspNetCore.Authentication.AzureADB2C.UI.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.AzureADB2C.UI.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc"  />
     <Reference Include="Microsoft.AspNetCore.Authentication.JwtBearer"  />
diff --git a/src/Azure/AzureAppServices.HostingStartup/ref/Microsoft.AspNetCore.AzureAppServices.HostingStartup.csproj b/src/Azure/AzureAppServices.HostingStartup/ref/Microsoft.AspNetCore.AzureAppServices.HostingStartup.csproj
index 5aa17d22ef..5026fcfe23 100644
--- a/src/Azure/AzureAppServices.HostingStartup/ref/Microsoft.AspNetCore.AzureAppServices.HostingStartup.csproj
+++ b/src/Azure/AzureAppServices.HostingStartup/ref/Microsoft.AspNetCore.AzureAppServices.HostingStartup.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.AzureAppServices.HostingStartup.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.AzureAppServicesIntegration"  />
     <Reference Include="Microsoft.Extensions.Configuration.EnvironmentVariables"  />
diff --git a/src/Azure/AzureAppServicesIntegration/ref/Microsoft.AspNetCore.AzureAppServicesIntegration.csproj b/src/Azure/AzureAppServicesIntegration/ref/Microsoft.AspNetCore.AzureAppServicesIntegration.csproj
index 40f753cc8d..ba1159838b 100644
--- a/src/Azure/AzureAppServicesIntegration/ref/Microsoft.AspNetCore.AzureAppServicesIntegration.csproj
+++ b/src/Azure/AzureAppServicesIntegration/ref/Microsoft.AspNetCore.AzureAppServicesIntegration.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.AzureAppServicesIntegration.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting"  />
     <Reference Include="Microsoft.Extensions.Logging.AzureAppServices"  />
diff --git a/src/Components/Authorization/ref/Microsoft.AspNetCore.Components.Authorization.csproj b/src/Components/Authorization/ref/Microsoft.AspNetCore.Components.Authorization.csproj
index 50754ab70b..513c24575d 100644
--- a/src/Components/Authorization/ref/Microsoft.AspNetCore.Components.Authorization.csproj
+++ b/src/Components/Authorization/ref/Microsoft.AspNetCore.Components.Authorization.csproj
@@ -1,14 +1,14 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.Components.Authorization.netstandard2.0.cs" />
     <Reference Include="Microsoft.AspNetCore.Authorization"  />
     <Reference Include="Microsoft.AspNetCore.Components"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Components.Authorization.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authorization"  />
     <Reference Include="Microsoft.AspNetCore.Components"  />
diff --git a/src/Components/Blazor/Server/ref/Microsoft.AspNetCore.Blazor.Server.csproj b/src/Components/Blazor/Server/ref/Microsoft.AspNetCore.Blazor.Server.csproj
index d7e4d948ed..9222fac02f 100644
--- a/src/Components/Blazor/Server/ref/Microsoft.AspNetCore.Blazor.Server.csproj
+++ b/src/Components/Blazor/Server/ref/Microsoft.AspNetCore.Blazor.Server.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Blazor.Server.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.SpaServices.Extensions"  />
diff --git a/src/Components/Components/ref/Microsoft.AspNetCore.Components.csproj b/src/Components/Components/ref/Microsoft.AspNetCore.Components.csproj
index 7d8434de11..8a32a89b9e 100644
--- a/src/Components/Components/ref/Microsoft.AspNetCore.Components.csproj
+++ b/src/Components/Components/ref/Microsoft.AspNetCore.Components.csproj
@@ -1,7 +1,7 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.Components.netstandard2.0.cs" />
@@ -10,7 +10,7 @@
     <Reference Include="Microsoft.Extensions.HashCodeCombiner.Sources"  />
     <Reference Include="System.Buffers"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Components.netcoreapp.cs" />
     <Reference Include="Microsoft.Extensions.Logging.Abstractions"  />
     <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions"  />
diff --git a/src/Components/Forms/ref/Microsoft.AspNetCore.Components.Forms.csproj b/src/Components/Forms/ref/Microsoft.AspNetCore.Components.Forms.csproj
index 66f060ba8c..cc3fcfda27 100644
--- a/src/Components/Forms/ref/Microsoft.AspNetCore.Components.Forms.csproj
+++ b/src/Components/Forms/ref/Microsoft.AspNetCore.Components.Forms.csproj
@@ -1,14 +1,14 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.Components.Forms.netstandard2.0.cs" />
     <Reference Include="Microsoft.AspNetCore.Components"  />
     <Reference Include="System.ComponentModel.Annotations"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Components.Forms.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Components"  />
   </ItemGroup>
diff --git a/src/Components/Server/ref/Microsoft.AspNetCore.Components.Server.csproj b/src/Components/Server/ref/Microsoft.AspNetCore.Components.Server.csproj
index ccadda735b..838eac284a 100644
--- a/src/Components/Server/ref/Microsoft.AspNetCore.Components.Server.csproj
+++ b/src/Components/Server/ref/Microsoft.AspNetCore.Components.Server.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Components.Server.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Components.Authorization"  />
     <Reference Include="Microsoft.AspNetCore.Components.Web"  />
diff --git a/src/Components/Web/ref/Microsoft.AspNetCore.Components.Web.csproj b/src/Components/Web/ref/Microsoft.AspNetCore.Components.Web.csproj
index 3ea10ad5f4..cba25041e3 100644
--- a/src/Components/Web/ref/Microsoft.AspNetCore.Components.Web.csproj
+++ b/src/Components/Web/ref/Microsoft.AspNetCore.Components.Web.csproj
@@ -1,7 +1,7 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.Components.Web.netstandard2.0.cs" />
@@ -10,7 +10,7 @@
     <Reference Include="Microsoft.Extensions.DependencyInjection"  />
     <Reference Include="Microsoft.JSInterop"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Components.Web.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Components"  />
     <Reference Include="Microsoft.AspNetCore.Components.Forms"  />
diff --git a/src/DataProtection/DataProtection/ref/Microsoft.AspNetCore.DataProtection.csproj b/src/DataProtection/DataProtection/ref/Microsoft.AspNetCore.DataProtection.csproj
index 76a12562c5..9408c35dad 100644
--- a/src/DataProtection/DataProtection/ref/Microsoft.AspNetCore.DataProtection.csproj
+++ b/src/DataProtection/DataProtection/ref/Microsoft.AspNetCore.DataProtection.csproj
@@ -1,7 +1,7 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.DataProtection.netstandard2.0.cs" />
@@ -15,7 +15,7 @@
     <Reference Include="System.Security.Cryptography.Xml"  />
     <Reference Include="System.Security.Principal.Windows"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.DataProtection.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Cryptography.Internal"  />
     <Reference Include="Microsoft.AspNetCore.DataProtection.Abstractions"  />
diff --git a/src/DataProtection/Extensions/ref/Microsoft.AspNetCore.DataProtection.Extensions.csproj b/src/DataProtection/Extensions/ref/Microsoft.AspNetCore.DataProtection.Extensions.csproj
index 939509ef2e..8edb1af38e 100644
--- a/src/DataProtection/Extensions/ref/Microsoft.AspNetCore.DataProtection.Extensions.csproj
+++ b/src/DataProtection/Extensions/ref/Microsoft.AspNetCore.DataProtection.Extensions.csproj
@@ -1,14 +1,14 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.DataProtection.Extensions.netstandard2.0.cs" />
     <Reference Include="Microsoft.AspNetCore.DataProtection"  />
     <Reference Include="Microsoft.Extensions.DependencyInjection"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.DataProtection.Extensions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.DataProtection"  />
     <Reference Include="Microsoft.Extensions.DependencyInjection"  />
diff --git a/src/DefaultBuilder/ref/Microsoft.AspNetCore.csproj b/src/DefaultBuilder/ref/Microsoft.AspNetCore.csproj
index 78aa1ca7f9..21597d756b 100644
--- a/src/DefaultBuilder/ref/Microsoft.AspNetCore.csproj
+++ b/src/DefaultBuilder/ref/Microsoft.AspNetCore.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Diagnostics"  />
     <Reference Include="Microsoft.AspNetCore.HostFiltering"  />
diff --git a/src/Hosting/Abstractions/ref/Microsoft.AspNetCore.Hosting.Abstractions.csproj b/src/Hosting/Abstractions/ref/Microsoft.AspNetCore.Hosting.Abstractions.csproj
index ef6ec133be..61fcaa92d3 100644
--- a/src/Hosting/Abstractions/ref/Microsoft.AspNetCore.Hosting.Abstractions.csproj
+++ b/src/Hosting/Abstractions/ref/Microsoft.AspNetCore.Hosting.Abstractions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Hosting.Abstractions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting.Server.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
diff --git a/src/Hosting/Hosting/ref/Microsoft.AspNetCore.Hosting.csproj b/src/Hosting/Hosting/ref/Microsoft.AspNetCore.Hosting.csproj
index d229cfd5cd..4c42616118 100644
--- a/src/Hosting/Hosting/ref/Microsoft.AspNetCore.Hosting.csproj
+++ b/src/Hosting/Hosting/ref/Microsoft.AspNetCore.Hosting.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Hosting.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
diff --git a/src/Hosting/Server.Abstractions/ref/Microsoft.AspNetCore.Hosting.Server.Abstractions.csproj b/src/Hosting/Server.Abstractions/ref/Microsoft.AspNetCore.Hosting.Server.Abstractions.csproj
index 857c555fac..35ec4bd0e7 100644
--- a/src/Hosting/Server.Abstractions/ref/Microsoft.AspNetCore.Hosting.Server.Abstractions.csproj
+++ b/src/Hosting/Server.Abstractions/ref/Microsoft.AspNetCore.Hosting.Server.Abstractions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Hosting.Server.Abstractions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Features"  />
     <Reference Include="Microsoft.Extensions.Configuration.Abstractions"  />
diff --git a/src/Hosting/TestHost/ref/Microsoft.AspNetCore.TestHost.csproj b/src/Hosting/TestHost/ref/Microsoft.AspNetCore.TestHost.csproj
index bbbce6e495..7dd0c1a2d2 100644
--- a/src/Hosting/TestHost/ref/Microsoft.AspNetCore.TestHost.csproj
+++ b/src/Hosting/TestHost/ref/Microsoft.AspNetCore.TestHost.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.TestHost.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting"  />
     <Reference Include="Microsoft.Extensions.HostFactoryResolver.Sources"  />
diff --git a/src/Hosting/WindowsServices/ref/Microsoft.AspNetCore.Hosting.WindowsServices.csproj b/src/Hosting/WindowsServices/ref/Microsoft.AspNetCore.Hosting.WindowsServices.csproj
index 5f50313831..a74f17e0ff 100644
--- a/src/Hosting/WindowsServices/ref/Microsoft.AspNetCore.Hosting.WindowsServices.csproj
+++ b/src/Hosting/WindowsServices/ref/Microsoft.AspNetCore.Hosting.WindowsServices.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Hosting.WindowsServices.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting"  />
     <Reference Include="System.ServiceProcess.ServiceController"  />
diff --git a/src/Html/Abstractions/ref/Microsoft.AspNetCore.Html.Abstractions.csproj b/src/Html/Abstractions/ref/Microsoft.AspNetCore.Html.Abstractions.csproj
index e81e300554..823d7d61ce 100644
--- a/src/Html/Abstractions/ref/Microsoft.AspNetCore.Html.Abstractions.csproj
+++ b/src/Html/Abstractions/ref/Microsoft.AspNetCore.Html.Abstractions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Html.Abstractions.netcoreapp.cs" />
     
   </ItemGroup>
diff --git a/src/Http/Authentication.Abstractions/ref/Microsoft.AspNetCore.Authentication.Abstractions.csproj b/src/Http/Authentication.Abstractions/ref/Microsoft.AspNetCore.Authentication.Abstractions.csproj
index 4ab5f62d37..9103a387f3 100644
--- a/src/Http/Authentication.Abstractions/ref/Microsoft.AspNetCore.Authentication.Abstractions.csproj
+++ b/src/Http/Authentication.Abstractions/ref/Microsoft.AspNetCore.Authentication.Abstractions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.Abstractions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
     <Reference Include="Microsoft.Extensions.Logging.Abstractions"  />
diff --git a/src/Http/Authentication.Core/ref/Microsoft.AspNetCore.Authentication.Core.csproj b/src/Http/Authentication.Core/ref/Microsoft.AspNetCore.Authentication.Core.csproj
index 3dd74267ed..149470accd 100644
--- a/src/Http/Authentication.Core/ref/Microsoft.AspNetCore.Authentication.Core.csproj
+++ b/src/Http/Authentication.Core/ref/Microsoft.AspNetCore.Authentication.Core.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.Core.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Http"  />
diff --git a/src/Http/Headers/ref/Microsoft.Net.Http.Headers.csproj b/src/Http/Headers/ref/Microsoft.Net.Http.Headers.csproj
index ca7ee9d791..85d1d1e5cd 100644
--- a/src/Http/Headers/ref/Microsoft.Net.Http.Headers.csproj
+++ b/src/Http/Headers/ref/Microsoft.Net.Http.Headers.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.Net.Http.Headers.netcoreapp.cs" />
     <Reference Include="Microsoft.Extensions.Primitives"  />
   </ItemGroup>
diff --git a/src/Http/Http.Abstractions/ref/Microsoft.AspNetCore.Http.Abstractions.csproj b/src/Http/Http.Abstractions/ref/Microsoft.AspNetCore.Http.Abstractions.csproj
index 031df82208..a3f0a4268f 100644
--- a/src/Http/Http.Abstractions/ref/Microsoft.AspNetCore.Http.Abstractions.csproj
+++ b/src/Http/Http.Abstractions/ref/Microsoft.AspNetCore.Http.Abstractions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Http.Abstractions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Features"  />
     <Reference Include="Microsoft.Extensions.ActivatorUtilities.Sources"  />
diff --git a/src/Http/Http.Extensions/ref/Microsoft.AspNetCore.Http.Extensions.csproj b/src/Http/Http.Extensions/ref/Microsoft.AspNetCore.Http.Extensions.csproj
index c1610a11be..a19e1c7aa8 100644
--- a/src/Http/Http.Extensions/ref/Microsoft.AspNetCore.Http.Extensions.csproj
+++ b/src/Http/Http.Extensions/ref/Microsoft.AspNetCore.Http.Extensions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Http.Extensions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
     <Reference Include="Microsoft.Net.Http.Headers"  />
diff --git a/src/Http/Http.Features/ref/Microsoft.AspNetCore.Http.Features.csproj b/src/Http/Http.Features/ref/Microsoft.AspNetCore.Http.Features.csproj
index de2fcf47cb..ca82096556 100644
--- a/src/Http/Http.Features/ref/Microsoft.AspNetCore.Http.Features.csproj
+++ b/src/Http/Http.Features/ref/Microsoft.AspNetCore.Http.Features.csproj
@@ -1,14 +1,14 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.Http.Features.netstandard2.0.cs" />
     <Reference Include="Microsoft.Extensions.Primitives"  />
     <Reference Include="System.IO.Pipelines"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Http.Features.netcoreapp.cs" />
     <Reference Include="Microsoft.Extensions.Primitives"  />
     <Reference Include="System.IO.Pipelines"  />
diff --git a/src/Http/Http/ref/Microsoft.AspNetCore.Http.csproj b/src/Http/Http/ref/Microsoft.AspNetCore.Http.csproj
index 2eb29c4346..fc7e44c40a 100644
--- a/src/Http/Http/ref/Microsoft.AspNetCore.Http.csproj
+++ b/src/Http/Http/ref/Microsoft.AspNetCore.Http.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Http.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.WebUtilities"  />
diff --git a/src/Http/Owin/ref/Microsoft.AspNetCore.Owin.csproj b/src/Http/Owin/ref/Microsoft.AspNetCore.Owin.csproj
index e952868d38..4c74b7422b 100644
--- a/src/Http/Owin/ref/Microsoft.AspNetCore.Owin.csproj
+++ b/src/Http/Owin/ref/Microsoft.AspNetCore.Owin.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Owin.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http"  />
   </ItemGroup>
diff --git a/src/Http/Routing.Abstractions/ref/Microsoft.AspNetCore.Routing.Abstractions.csproj b/src/Http/Routing.Abstractions/ref/Microsoft.AspNetCore.Routing.Abstractions.csproj
index 7bce9f878b..c4eba5614a 100644
--- a/src/Http/Routing.Abstractions/ref/Microsoft.AspNetCore.Routing.Abstractions.csproj
+++ b/src/Http/Routing.Abstractions/ref/Microsoft.AspNetCore.Routing.Abstractions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Routing.Abstractions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
   </ItemGroup>
diff --git a/src/Http/Routing/ref/Microsoft.AspNetCore.Routing.csproj b/src/Http/Routing/ref/Microsoft.AspNetCore.Routing.csproj
index 373891debc..90ff9fea7c 100644
--- a/src/Http/Routing/ref/Microsoft.AspNetCore.Routing.csproj
+++ b/src/Http/Routing/ref/Microsoft.AspNetCore.Routing.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Routing.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authorization"  />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
diff --git a/src/Http/WebUtilities/ref/Microsoft.AspNetCore.WebUtilities.csproj b/src/Http/WebUtilities/ref/Microsoft.AspNetCore.WebUtilities.csproj
index 42e270dac6..1b56da784a 100644
--- a/src/Http/WebUtilities/ref/Microsoft.AspNetCore.WebUtilities.csproj
+++ b/src/Http/WebUtilities/ref/Microsoft.AspNetCore.WebUtilities.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.WebUtilities.netcoreapp.cs" />
     <Reference Include="Microsoft.Net.Http.Headers"  />
     <Reference Include="System.IO.Pipelines"  />
diff --git a/src/Identity/Core/ref/Microsoft.AspNetCore.Identity.csproj b/src/Identity/Core/ref/Microsoft.AspNetCore.Identity.csproj
index cb6ae59246..7874f2c36e 100644
--- a/src/Identity/Core/ref/Microsoft.AspNetCore.Identity.csproj
+++ b/src/Identity/Core/ref/Microsoft.AspNetCore.Identity.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Identity.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.Cookies"  />
     <Reference Include="Microsoft.Extensions.Identity.Core"  />
diff --git a/src/Identity/EntityFrameworkCore/ref/Microsoft.AspNetCore.Identity.EntityFrameworkCore.csproj b/src/Identity/EntityFrameworkCore/ref/Microsoft.AspNetCore.Identity.EntityFrameworkCore.csproj
index 24538686b3..5faea76cbd 100644
--- a/src/Identity/EntityFrameworkCore/ref/Microsoft.AspNetCore.Identity.EntityFrameworkCore.csproj
+++ b/src/Identity/EntityFrameworkCore/ref/Microsoft.AspNetCore.Identity.EntityFrameworkCore.csproj
@@ -1,14 +1,14 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.1;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.1;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.1'">
     <Compile Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore.netstandard2.1.cs" />
     <Reference Include="Microsoft.Extensions.Identity.Stores"  />
     <Reference Include="Microsoft.EntityFrameworkCore.Relational"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore.netcoreapp.cs" />
     <Reference Include="Microsoft.Extensions.Identity.Stores"  />
     <Reference Include="Microsoft.EntityFrameworkCore.Relational"  />
diff --git a/src/Identity/Extensions.Core/ref/Microsoft.Extensions.Identity.Core.csproj b/src/Identity/Extensions.Core/ref/Microsoft.Extensions.Identity.Core.csproj
index 6b7ce84495..ae16fce673 100644
--- a/src/Identity/Extensions.Core/ref/Microsoft.Extensions.Identity.Core.csproj
+++ b/src/Identity/Extensions.Core/ref/Microsoft.Extensions.Identity.Core.csproj
@@ -1,7 +1,7 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.Extensions.Identity.Core.netstandard2.0.cs" />
@@ -9,7 +9,7 @@
     <Reference Include="Microsoft.Extensions.Logging"  />
     <Reference Include="Microsoft.Extensions.Options"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.Extensions.Identity.Core.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Cryptography.KeyDerivation"  />
     <Reference Include="Microsoft.Extensions.Logging"  />
diff --git a/src/Identity/Extensions.Stores/ref/Microsoft.Extensions.Identity.Stores.csproj b/src/Identity/Extensions.Stores/ref/Microsoft.Extensions.Identity.Stores.csproj
index 914b3ae226..f490a31256 100644
--- a/src/Identity/Extensions.Stores/ref/Microsoft.Extensions.Identity.Stores.csproj
+++ b/src/Identity/Extensions.Stores/ref/Microsoft.Extensions.Identity.Stores.csproj
@@ -1,14 +1,14 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.Extensions.Identity.Stores.netstandard2.0.cs" />
     <Reference Include="Microsoft.Extensions.Logging"  />
     <Reference Include="Microsoft.Extensions.Identity.Core"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.Extensions.Identity.Stores.netcoreapp.cs" />
     <Reference Include="Microsoft.Extensions.Logging"  />
     <Reference Include="Microsoft.Extensions.Identity.Core"  />
diff --git a/src/Identity/UI/ref/Microsoft.AspNetCore.Identity.UI.csproj b/src/Identity/UI/ref/Microsoft.AspNetCore.Identity.UI.csproj
index 38e8a8ad85..51b7eca6c4 100644
--- a/src/Identity/UI/ref/Microsoft.AspNetCore.Identity.UI.csproj
+++ b/src/Identity/UI/ref/Microsoft.AspNetCore.Identity.UI.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Identity.UI.netcoreapp.cs" />
     <Reference Include="Newtonsoft.Json"  />
     <Reference Include="Microsoft.AspNetCore.Identity"  />
diff --git a/src/Middleware/CORS/ref/Microsoft.AspNetCore.Cors.csproj b/src/Middleware/CORS/ref/Microsoft.AspNetCore.Cors.csproj
index 1cda1d9c46..ae28a55976 100644
--- a/src/Middleware/CORS/ref/Microsoft.AspNetCore.Cors.csproj
+++ b/src/Middleware/CORS/ref/Microsoft.AspNetCore.Cors.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Cors.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
     <Reference Include="Microsoft.AspNetCore.Routing"  />
diff --git a/src/Middleware/ConcurrencyLimiter/ref/Microsoft.AspNetCore.ConcurrencyLimiter.csproj b/src/Middleware/ConcurrencyLimiter/ref/Microsoft.AspNetCore.ConcurrencyLimiter.csproj
index 85fd94d0bc..1b36bc0211 100644
--- a/src/Middleware/ConcurrencyLimiter/ref/Microsoft.AspNetCore.ConcurrencyLimiter.csproj
+++ b/src/Middleware/ConcurrencyLimiter/ref/Microsoft.AspNetCore.ConcurrencyLimiter.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.ConcurrencyLimiter.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
     <Reference Include="Microsoft.Extensions.Logging.Abstractions"  />
diff --git a/src/Middleware/Diagnostics.Abstractions/ref/Microsoft.AspNetCore.Diagnostics.Abstractions.csproj b/src/Middleware/Diagnostics.Abstractions/ref/Microsoft.AspNetCore.Diagnostics.Abstractions.csproj
index 4a3c5f0252..b8673b9785 100644
--- a/src/Middleware/Diagnostics.Abstractions/ref/Microsoft.AspNetCore.Diagnostics.Abstractions.csproj
+++ b/src/Middleware/Diagnostics.Abstractions/ref/Microsoft.AspNetCore.Diagnostics.Abstractions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Diagnostics.Abstractions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
   </ItemGroup>
diff --git a/src/Middleware/Diagnostics.EntityFrameworkCore/ref/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.csproj b/src/Middleware/Diagnostics.EntityFrameworkCore/ref/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.csproj
index e77fce494d..223568b68e 100644
--- a/src/Middleware/Diagnostics.EntityFrameworkCore/ref/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.csproj
+++ b/src/Middleware/Diagnostics.EntityFrameworkCore/ref/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
     <Reference Include="Microsoft.EntityFrameworkCore.Relational"  />
diff --git a/src/Middleware/Diagnostics/ref/Microsoft.AspNetCore.Diagnostics.csproj b/src/Middleware/Diagnostics/ref/Microsoft.AspNetCore.Diagnostics.csproj
index 39fab8b7b2..1cb4a825a6 100644
--- a/src/Middleware/Diagnostics/ref/Microsoft.AspNetCore.Diagnostics.csproj
+++ b/src/Middleware/Diagnostics/ref/Microsoft.AspNetCore.Diagnostics.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Diagnostics.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Diagnostics.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
diff --git a/src/Middleware/HeaderPropagation/ref/Microsoft.AspNetCore.HeaderPropagation.csproj b/src/Middleware/HeaderPropagation/ref/Microsoft.AspNetCore.HeaderPropagation.csproj
index dfc5e38886..47f0e56bb4 100644
--- a/src/Middleware/HeaderPropagation/ref/Microsoft.AspNetCore.HeaderPropagation.csproj
+++ b/src/Middleware/HeaderPropagation/ref/Microsoft.AspNetCore.HeaderPropagation.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.HeaderPropagation.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http"  />
     <Reference Include="Microsoft.Extensions.Http"  />
diff --git a/src/Middleware/HealthChecks/ref/Microsoft.AspNetCore.Diagnostics.HealthChecks.csproj b/src/Middleware/HealthChecks/ref/Microsoft.AspNetCore.Diagnostics.HealthChecks.csproj
index c1afa1761f..0fbb1b252a 100644
--- a/src/Middleware/HealthChecks/ref/Microsoft.AspNetCore.Diagnostics.HealthChecks.csproj
+++ b/src/Middleware/HealthChecks/ref/Microsoft.AspNetCore.Diagnostics.HealthChecks.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Diagnostics.HealthChecks.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Routing"  />
diff --git a/src/Middleware/HostFiltering/ref/Microsoft.AspNetCore.HostFiltering.csproj b/src/Middleware/HostFiltering/ref/Microsoft.AspNetCore.HostFiltering.csproj
index 04b4cf19d2..4329a9a756 100644
--- a/src/Middleware/HostFiltering/ref/Microsoft.AspNetCore.HostFiltering.csproj
+++ b/src/Middleware/HostFiltering/ref/Microsoft.AspNetCore.HostFiltering.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.HostFiltering.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http"  />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
diff --git a/src/Middleware/HttpOverrides/ref/Microsoft.AspNetCore.HttpOverrides.csproj b/src/Middleware/HttpOverrides/ref/Microsoft.AspNetCore.HttpOverrides.csproj
index 45a0525ffd..1e82fd966c 100644
--- a/src/Middleware/HttpOverrides/ref/Microsoft.AspNetCore.HttpOverrides.csproj
+++ b/src/Middleware/HttpOverrides/ref/Microsoft.AspNetCore.HttpOverrides.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.HttpOverrides.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
     <Reference Include="Microsoft.Extensions.Logging.Abstractions"  />
diff --git a/src/Middleware/HttpsPolicy/ref/Microsoft.AspNetCore.HttpsPolicy.csproj b/src/Middleware/HttpsPolicy/ref/Microsoft.AspNetCore.HttpsPolicy.csproj
index e74a0970a3..11cc92a331 100644
--- a/src/Middleware/HttpsPolicy/ref/Microsoft.AspNetCore.HttpsPolicy.csproj
+++ b/src/Middleware/HttpsPolicy/ref/Microsoft.AspNetCore.HttpsPolicy.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.HttpsPolicy.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http"  />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
diff --git a/src/Middleware/Localization.Routing/ref/Microsoft.AspNetCore.Localization.Routing.csproj b/src/Middleware/Localization.Routing/ref/Microsoft.AspNetCore.Localization.Routing.csproj
index e0d3c3404d..901f6f9fef 100644
--- a/src/Middleware/Localization.Routing/ref/Microsoft.AspNetCore.Localization.Routing.csproj
+++ b/src/Middleware/Localization.Routing/ref/Microsoft.AspNetCore.Localization.Routing.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Localization.Routing.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Localization"  />
     <Reference Include="Microsoft.AspNetCore.Routing.Abstractions"  />
diff --git a/src/Middleware/Localization/ref/Microsoft.AspNetCore.Localization.csproj b/src/Middleware/Localization/ref/Microsoft.AspNetCore.Localization.csproj
index 27befdbf5d..2cac309937 100644
--- a/src/Middleware/Localization/ref/Microsoft.AspNetCore.Localization.csproj
+++ b/src/Middleware/Localization/ref/Microsoft.AspNetCore.Localization.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Localization.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
     <Reference Include="Microsoft.Extensions.Localization.Abstractions"  />
diff --git a/src/Middleware/MiddlewareAnalysis/ref/Microsoft.AspNetCore.MiddlewareAnalysis.csproj b/src/Middleware/MiddlewareAnalysis/ref/Microsoft.AspNetCore.MiddlewareAnalysis.csproj
index 0239d804fa..869cc472b9 100644
--- a/src/Middleware/MiddlewareAnalysis/ref/Microsoft.AspNetCore.MiddlewareAnalysis.csproj
+++ b/src/Middleware/MiddlewareAnalysis/ref/Microsoft.AspNetCore.MiddlewareAnalysis.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.MiddlewareAnalysis.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
     <Reference Include="Microsoft.Extensions.DependencyInjection.Abstractions"  />
diff --git a/src/Middleware/NodeServices/ref/Microsoft.AspNetCore.NodeServices.csproj b/src/Middleware/NodeServices/ref/Microsoft.AspNetCore.NodeServices.csproj
index eb2d9cc1ac..6d39c2bb03 100644
--- a/src/Middleware/NodeServices/ref/Microsoft.AspNetCore.NodeServices.csproj
+++ b/src/Middleware/NodeServices/ref/Microsoft.AspNetCore.NodeServices.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.NodeServices.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
     <Reference Include="Microsoft.Extensions.Logging.Console"  />
diff --git a/src/Middleware/ResponseCaching.Abstractions/ref/Microsoft.AspNetCore.ResponseCaching.Abstractions.csproj b/src/Middleware/ResponseCaching.Abstractions/ref/Microsoft.AspNetCore.ResponseCaching.Abstractions.csproj
index 0fe41c403c..e6f989941a 100644
--- a/src/Middleware/ResponseCaching.Abstractions/ref/Microsoft.AspNetCore.ResponseCaching.Abstractions.csproj
+++ b/src/Middleware/ResponseCaching.Abstractions/ref/Microsoft.AspNetCore.ResponseCaching.Abstractions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.ResponseCaching.Abstractions.netcoreapp.cs" />
     <Reference Include="Microsoft.Extensions.Primitives"  />
   </ItemGroup>
diff --git a/src/Middleware/ResponseCaching/ref/Microsoft.AspNetCore.ResponseCaching.csproj b/src/Middleware/ResponseCaching/ref/Microsoft.AspNetCore.ResponseCaching.csproj
index f0a0ecfde5..76433bb724 100644
--- a/src/Middleware/ResponseCaching/ref/Microsoft.AspNetCore.ResponseCaching.csproj
+++ b/src/Middleware/ResponseCaching/ref/Microsoft.AspNetCore.ResponseCaching.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.ResponseCaching.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.ResponseCaching.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
diff --git a/src/Middleware/ResponseCompression/ref/Microsoft.AspNetCore.ResponseCompression.csproj b/src/Middleware/ResponseCompression/ref/Microsoft.AspNetCore.ResponseCompression.csproj
index 8d4945722f..b5c02e8d56 100644
--- a/src/Middleware/ResponseCompression/ref/Microsoft.AspNetCore.ResponseCompression.csproj
+++ b/src/Middleware/ResponseCompression/ref/Microsoft.AspNetCore.ResponseCompression.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.ResponseCompression.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http"  />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
diff --git a/src/Middleware/Rewrite/ref/Microsoft.AspNetCore.Rewrite.csproj b/src/Middleware/Rewrite/ref/Microsoft.AspNetCore.Rewrite.csproj
index ce9018da50..e277c76b82 100644
--- a/src/Middleware/Rewrite/ref/Microsoft.AspNetCore.Rewrite.csproj
+++ b/src/Middleware/Rewrite/ref/Microsoft.AspNetCore.Rewrite.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Rewrite.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
diff --git a/src/Middleware/Session/ref/Microsoft.AspNetCore.Session.csproj b/src/Middleware/Session/ref/Microsoft.AspNetCore.Session.csproj
index 40282457cd..7d84ebe33c 100644
--- a/src/Middleware/Session/ref/Microsoft.AspNetCore.Session.csproj
+++ b/src/Middleware/Session/ref/Microsoft.AspNetCore.Session.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Session.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.DataProtection"  />
     <Reference Include="Microsoft.AspNetCore.Http.Abstractions"  />
diff --git a/src/Middleware/SpaServices.Extensions/ref/Microsoft.AspNetCore.SpaServices.Extensions.csproj b/src/Middleware/SpaServices.Extensions/ref/Microsoft.AspNetCore.SpaServices.Extensions.csproj
index 0a27625ebe..d0234531a8 100644
--- a/src/Middleware/SpaServices.Extensions/ref/Microsoft.AspNetCore.SpaServices.Extensions.csproj
+++ b/src/Middleware/SpaServices.Extensions/ref/Microsoft.AspNetCore.SpaServices.Extensions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.SpaServices.Extensions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.SpaServices"  />
     <Reference Include="Microsoft.AspNetCore.StaticFiles"  />
diff --git a/src/Middleware/SpaServices/ref/Microsoft.AspNetCore.SpaServices.csproj b/src/Middleware/SpaServices/ref/Microsoft.AspNetCore.SpaServices.csproj
index 2a0a95463a..ca97a61ec6 100644
--- a/src/Middleware/SpaServices/ref/Microsoft.AspNetCore.SpaServices.csproj
+++ b/src/Middleware/SpaServices/ref/Microsoft.AspNetCore.SpaServices.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.SpaServices.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.NodeServices"  />
     <Reference Include="Microsoft.AspNetCore.Mvc.TagHelpers"  />
diff --git a/src/Middleware/StaticFiles/ref/Microsoft.AspNetCore.StaticFiles.csproj b/src/Middleware/StaticFiles/ref/Microsoft.AspNetCore.StaticFiles.csproj
index 2b61201b52..61c5299489 100644
--- a/src/Middleware/StaticFiles/ref/Microsoft.AspNetCore.StaticFiles.csproj
+++ b/src/Middleware/StaticFiles/ref/Microsoft.AspNetCore.StaticFiles.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.StaticFiles.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
diff --git a/src/Middleware/WebSockets/ref/Microsoft.AspNetCore.WebSockets.csproj b/src/Middleware/WebSockets/ref/Microsoft.AspNetCore.WebSockets.csproj
index 1436d1fe22..3223cb9b16 100644
--- a/src/Middleware/WebSockets/ref/Microsoft.AspNetCore.WebSockets.csproj
+++ b/src/Middleware/WebSockets/ref/Microsoft.AspNetCore.WebSockets.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.WebSockets.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Extensions"  />
     <Reference Include="Microsoft.Extensions.Logging.Abstractions"  />
diff --git a/src/Mvc/Mvc.Abstractions/ref/Microsoft.AspNetCore.Mvc.Abstractions.csproj b/src/Mvc/Mvc.Abstractions/ref/Microsoft.AspNetCore.Mvc.Abstractions.csproj
index 3a09adfb44..86533825ea 100644
--- a/src/Mvc/Mvc.Abstractions/ref/Microsoft.AspNetCore.Mvc.Abstractions.csproj
+++ b/src/Mvc/Mvc.Abstractions/ref/Microsoft.AspNetCore.Mvc.Abstractions.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.Abstractions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Routing.Abstractions"  />
     <Reference Include="Microsoft.Net.Http.Headers"  />
diff --git a/src/Mvc/Mvc.ApiExplorer/ref/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj b/src/Mvc/Mvc.ApiExplorer/ref/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj
index 93ec7c3d85..7a6eb78c83 100644
--- a/src/Mvc/Mvc.ApiExplorer/ref/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj
+++ b/src/Mvc/Mvc.ApiExplorer/ref/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.ApiExplorer.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Core"  />
   </ItemGroup>
diff --git a/src/Mvc/Mvc.Core/ref/Microsoft.AspNetCore.Mvc.Core.csproj b/src/Mvc/Mvc.Core/ref/Microsoft.AspNetCore.Mvc.Core.csproj
index a6a1e42942..ad6518033f 100644
--- a/src/Mvc/Mvc.Core/ref/Microsoft.AspNetCore.Mvc.Core.csproj
+++ b/src/Mvc/Mvc.Core/ref/Microsoft.AspNetCore.Mvc.Core.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.Core.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Authentication.Core"  />
diff --git a/src/Mvc/Mvc.Cors/ref/Microsoft.AspNetCore.Mvc.Cors.csproj b/src/Mvc/Mvc.Cors/ref/Microsoft.AspNetCore.Mvc.Cors.csproj
index b4ebb29054..a7573bfcb7 100644
--- a/src/Mvc/Mvc.Cors/ref/Microsoft.AspNetCore.Mvc.Cors.csproj
+++ b/src/Mvc/Mvc.Cors/ref/Microsoft.AspNetCore.Mvc.Cors.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.Cors.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Core"  />
     <Reference Include="Microsoft.AspNetCore.Cors"  />
diff --git a/src/Mvc/Mvc.DataAnnotations/ref/Microsoft.AspNetCore.Mvc.DataAnnotations.csproj b/src/Mvc/Mvc.DataAnnotations/ref/Microsoft.AspNetCore.Mvc.DataAnnotations.csproj
index 81e05bc963..b7ee4b1bf2 100644
--- a/src/Mvc/Mvc.DataAnnotations/ref/Microsoft.AspNetCore.Mvc.DataAnnotations.csproj
+++ b/src/Mvc/Mvc.DataAnnotations/ref/Microsoft.AspNetCore.Mvc.DataAnnotations.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.DataAnnotations.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Core"  />
     <Reference Include="Microsoft.Extensions.Localization"  />
diff --git a/src/Mvc/Mvc.Formatters.Json/ref/Microsoft.AspNetCore.Mvc.Formatters.Json.csproj b/src/Mvc/Mvc.Formatters.Json/ref/Microsoft.AspNetCore.Mvc.Formatters.Json.csproj
index da2bc2b5f2..c95b78e21b 100644
--- a/src/Mvc/Mvc.Formatters.Json/ref/Microsoft.AspNetCore.Mvc.Formatters.Json.csproj
+++ b/src/Mvc/Mvc.Formatters.Json/ref/Microsoft.AspNetCore.Mvc.Formatters.Json.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.Formatters.Json.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Core"  />
   </ItemGroup>
diff --git a/src/Mvc/Mvc.Formatters.Xml/ref/Microsoft.AspNetCore.Mvc.Formatters.Xml.csproj b/src/Mvc/Mvc.Formatters.Xml/ref/Microsoft.AspNetCore.Mvc.Formatters.Xml.csproj
index a2383c7a04..6e1345e58a 100644
--- a/src/Mvc/Mvc.Formatters.Xml/ref/Microsoft.AspNetCore.Mvc.Formatters.Xml.csproj
+++ b/src/Mvc/Mvc.Formatters.Xml/ref/Microsoft.AspNetCore.Mvc.Formatters.Xml.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.Formatters.Xml.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Core"  />
   </ItemGroup>
diff --git a/src/Mvc/Mvc.Localization/ref/Microsoft.AspNetCore.Mvc.Localization.csproj b/src/Mvc/Mvc.Localization/ref/Microsoft.AspNetCore.Mvc.Localization.csproj
index 2a1cac3d09..27c1f74bf1 100644
--- a/src/Mvc/Mvc.Localization/ref/Microsoft.AspNetCore.Mvc.Localization.csproj
+++ b/src/Mvc/Mvc.Localization/ref/Microsoft.AspNetCore.Mvc.Localization.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.Localization.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Razor"  />
     <Reference Include="Microsoft.AspNetCore.Localization"  />
diff --git a/src/Mvc/Mvc.NewtonsoftJson/ref/Microsoft.AspNetCore.Mvc.NewtonsoftJson.csproj b/src/Mvc/Mvc.NewtonsoftJson/ref/Microsoft.AspNetCore.Mvc.NewtonsoftJson.csproj
index 854182bda6..397d31f63e 100644
--- a/src/Mvc/Mvc.NewtonsoftJson/ref/Microsoft.AspNetCore.Mvc.NewtonsoftJson.csproj
+++ b/src/Mvc/Mvc.NewtonsoftJson/ref/Microsoft.AspNetCore.Mvc.NewtonsoftJson.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.ViewFeatures"  />
     <Reference Include="Microsoft.AspNetCore.JsonPatch"  />
diff --git a/src/Mvc/Mvc.Razor.RuntimeCompilation/ref/Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.csproj b/src/Mvc/Mvc.Razor.RuntimeCompilation/ref/Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.csproj
index a117f57491..d6f2a9ffb7 100644
--- a/src/Mvc/Mvc.Razor.RuntimeCompilation/ref/Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.csproj
+++ b/src/Mvc/Mvc.Razor.RuntimeCompilation/ref/Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Razor.Extensions"  />
     <Reference Include="Microsoft.AspNetCore.Mvc.RazorPages"  />
diff --git a/src/Mvc/Mvc.Razor/ref/Microsoft.AspNetCore.Mvc.Razor.csproj b/src/Mvc/Mvc.Razor/ref/Microsoft.AspNetCore.Mvc.Razor.csproj
index a256500636..efa2947eb8 100644
--- a/src/Mvc/Mvc.Razor/ref/Microsoft.AspNetCore.Mvc.Razor.csproj
+++ b/src/Mvc/Mvc.Razor/ref/Microsoft.AspNetCore.Mvc.Razor.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.Razor.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.ViewFeatures"  />
     <Reference Include="Microsoft.AspNetCore.Razor.Runtime"  />
diff --git a/src/Mvc/Mvc.RazorPages/ref/Microsoft.AspNetCore.Mvc.RazorPages.csproj b/src/Mvc/Mvc.RazorPages/ref/Microsoft.AspNetCore.Mvc.RazorPages.csproj
index d215348532..d607941928 100644
--- a/src/Mvc/Mvc.RazorPages/ref/Microsoft.AspNetCore.Mvc.RazorPages.csproj
+++ b/src/Mvc/Mvc.RazorPages/ref/Microsoft.AspNetCore.Mvc.RazorPages.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.RazorPages.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Razor"  />
   </ItemGroup>
diff --git a/src/Mvc/Mvc.TagHelpers/ref/Microsoft.AspNetCore.Mvc.TagHelpers.csproj b/src/Mvc/Mvc.TagHelpers/ref/Microsoft.AspNetCore.Mvc.TagHelpers.csproj
index f7be632f84..ea02c2ce35 100644
--- a/src/Mvc/Mvc.TagHelpers/ref/Microsoft.AspNetCore.Mvc.TagHelpers.csproj
+++ b/src/Mvc/Mvc.TagHelpers/ref/Microsoft.AspNetCore.Mvc.TagHelpers.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.TagHelpers.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Razor"  />
     <Reference Include="Microsoft.AspNetCore.Razor.Runtime"  />
diff --git a/src/Mvc/Mvc.Testing/ref/Microsoft.AspNetCore.Mvc.Testing.csproj b/src/Mvc/Mvc.Testing/ref/Microsoft.AspNetCore.Mvc.Testing.csproj
index 4f200c8232..cb3241a4fa 100644
--- a/src/Mvc/Mvc.Testing/ref/Microsoft.AspNetCore.Mvc.Testing.csproj
+++ b/src/Mvc/Mvc.Testing/ref/Microsoft.AspNetCore.Mvc.Testing.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.Testing.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.TestHost"  />
     <Reference Include="Microsoft.AspNetCore.Mvc.Core"  />
diff --git a/src/Mvc/Mvc.ViewFeatures/ref/Microsoft.AspNetCore.Mvc.ViewFeatures.csproj b/src/Mvc/Mvc.ViewFeatures/ref/Microsoft.AspNetCore.Mvc.ViewFeatures.csproj
index 3b7af8aa6b..b6c9f4916c 100644
--- a/src/Mvc/Mvc.ViewFeatures/ref/Microsoft.AspNetCore.Mvc.ViewFeatures.csproj
+++ b/src/Mvc/Mvc.ViewFeatures/ref/Microsoft.AspNetCore.Mvc.ViewFeatures.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.ViewFeatures.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.Core"  />
     <Reference Include="Microsoft.AspNetCore.Mvc.DataAnnotations"  />
diff --git a/src/Mvc/Mvc/ref/Microsoft.AspNetCore.Mvc.csproj b/src/Mvc/Mvc/ref/Microsoft.AspNetCore.Mvc.csproj
index 0f24cda4d7..6098d80e5b 100644
--- a/src/Mvc/Mvc/ref/Microsoft.AspNetCore.Mvc.csproj
+++ b/src/Mvc/Mvc/ref/Microsoft.AspNetCore.Mvc.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Mvc.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Mvc.ApiExplorer"  />
     <Reference Include="Microsoft.AspNetCore.Mvc.Cors"  />
diff --git a/src/Razor/Razor.Runtime/ref/Microsoft.AspNetCore.Razor.Runtime.csproj b/src/Razor/Razor.Runtime/ref/Microsoft.AspNetCore.Razor.Runtime.csproj
index 84605b84f9..d3402450a1 100644
--- a/src/Razor/Razor.Runtime/ref/Microsoft.AspNetCore.Razor.Runtime.csproj
+++ b/src/Razor/Razor.Runtime/ref/Microsoft.AspNetCore.Razor.Runtime.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Razor.Runtime.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Razor"  />
     <Reference Include="Microsoft.AspNetCore.Html.Abstractions"  />
diff --git a/src/Razor/Razor/ref/Microsoft.AspNetCore.Razor.csproj b/src/Razor/Razor/ref/Microsoft.AspNetCore.Razor.csproj
index db23e55394..57241da578 100644
--- a/src/Razor/Razor/ref/Microsoft.AspNetCore.Razor.csproj
+++ b/src/Razor/Razor/ref/Microsoft.AspNetCore.Razor.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Razor.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Html.Abstractions"  />
     <Reference Include="Microsoft.Extensions.HashCodeCombiner.Sources"  />
diff --git a/src/Security/Authentication/Certificate/ref/Microsoft.AspNetCore.Authentication.Certificate.csproj b/src/Security/Authentication/Certificate/ref/Microsoft.AspNetCore.Authentication.Certificate.csproj
index c3948943cb..eb51fca5b9 100644
--- a/src/Security/Authentication/Certificate/ref/Microsoft.AspNetCore.Authentication.Certificate.csproj
+++ b/src/Security/Authentication/Certificate/ref/Microsoft.AspNetCore.Authentication.Certificate.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.Certificate.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication"  />
   </ItemGroup>
diff --git a/src/Security/Authentication/Cookies/ref/Microsoft.AspNetCore.Authentication.Cookies.csproj b/src/Security/Authentication/Cookies/ref/Microsoft.AspNetCore.Authentication.Cookies.csproj
index 8b9a433cb6..8d5ccfe0e7 100644
--- a/src/Security/Authentication/Cookies/ref/Microsoft.AspNetCore.Authentication.Cookies.csproj
+++ b/src/Security/Authentication/Cookies/ref/Microsoft.AspNetCore.Authentication.Cookies.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.Cookies.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication"  />
   </ItemGroup>
diff --git a/src/Security/Authentication/Core/ref/Microsoft.AspNetCore.Authentication.csproj b/src/Security/Authentication/Core/ref/Microsoft.AspNetCore.Authentication.csproj
index 7d04c0b3ff..244a2634e2 100644
--- a/src/Security/Authentication/Core/ref/Microsoft.AspNetCore.Authentication.csproj
+++ b/src/Security/Authentication/Core/ref/Microsoft.AspNetCore.Authentication.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.Core"  />
     <Reference Include="Microsoft.AspNetCore.DataProtection"  />
diff --git a/src/Security/Authentication/Facebook/ref/Microsoft.AspNetCore.Authentication.Facebook.csproj b/src/Security/Authentication/Facebook/ref/Microsoft.AspNetCore.Authentication.Facebook.csproj
index aaba28ec5b..b321a8165f 100644
--- a/src/Security/Authentication/Facebook/ref/Microsoft.AspNetCore.Authentication.Facebook.csproj
+++ b/src/Security/Authentication/Facebook/ref/Microsoft.AspNetCore.Authentication.Facebook.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.Facebook.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.OAuth"  />
   </ItemGroup>
diff --git a/src/Security/Authentication/Google/ref/Microsoft.AspNetCore.Authentication.Google.csproj b/src/Security/Authentication/Google/ref/Microsoft.AspNetCore.Authentication.Google.csproj
index fac509e694..eb7c734cb8 100644
--- a/src/Security/Authentication/Google/ref/Microsoft.AspNetCore.Authentication.Google.csproj
+++ b/src/Security/Authentication/Google/ref/Microsoft.AspNetCore.Authentication.Google.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.Google.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.OAuth"  />
   </ItemGroup>
diff --git a/src/Security/Authentication/JwtBearer/ref/Microsoft.AspNetCore.Authentication.JwtBearer.csproj b/src/Security/Authentication/JwtBearer/ref/Microsoft.AspNetCore.Authentication.JwtBearer.csproj
index e918161815..b84ff89ea7 100644
--- a/src/Security/Authentication/JwtBearer/ref/Microsoft.AspNetCore.Authentication.JwtBearer.csproj
+++ b/src/Security/Authentication/JwtBearer/ref/Microsoft.AspNetCore.Authentication.JwtBearer.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.JwtBearer.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication"  />
     <Reference Include="Microsoft.IdentityModel.Protocols.OpenIdConnect"  />
diff --git a/src/Security/Authentication/MicrosoftAccount/ref/Microsoft.AspNetCore.Authentication.MicrosoftAccount.csproj b/src/Security/Authentication/MicrosoftAccount/ref/Microsoft.AspNetCore.Authentication.MicrosoftAccount.csproj
index 1fd3a9830e..130cdbbe11 100644
--- a/src/Security/Authentication/MicrosoftAccount/ref/Microsoft.AspNetCore.Authentication.MicrosoftAccount.csproj
+++ b/src/Security/Authentication/MicrosoftAccount/ref/Microsoft.AspNetCore.Authentication.MicrosoftAccount.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.MicrosoftAccount.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.OAuth"  />
   </ItemGroup>
diff --git a/src/Security/Authentication/Negotiate/ref/Microsoft.AspNetCore.Authentication.Negotiate.csproj b/src/Security/Authentication/Negotiate/ref/Microsoft.AspNetCore.Authentication.Negotiate.csproj
index fe2fd6f7ed..1b93b39940 100644
--- a/src/Security/Authentication/Negotiate/ref/Microsoft.AspNetCore.Authentication.Negotiate.csproj
+++ b/src/Security/Authentication/Negotiate/ref/Microsoft.AspNetCore.Authentication.Negotiate.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.Negotiate.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication"  />
     <Reference Include="Microsoft.AspNetCore.Connections.Abstractions"  />
diff --git a/src/Security/Authentication/OAuth/ref/Microsoft.AspNetCore.Authentication.OAuth.csproj b/src/Security/Authentication/OAuth/ref/Microsoft.AspNetCore.Authentication.OAuth.csproj
index f008001efe..def1f59d1e 100644
--- a/src/Security/Authentication/OAuth/ref/Microsoft.AspNetCore.Authentication.OAuth.csproj
+++ b/src/Security/Authentication/OAuth/ref/Microsoft.AspNetCore.Authentication.OAuth.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.OAuth.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication"  />
   </ItemGroup>
diff --git a/src/Security/Authentication/OpenIdConnect/ref/Microsoft.AspNetCore.Authentication.OpenIdConnect.csproj b/src/Security/Authentication/OpenIdConnect/ref/Microsoft.AspNetCore.Authentication.OpenIdConnect.csproj
index d92233fa40..a5c4d9aa4c 100644
--- a/src/Security/Authentication/OpenIdConnect/ref/Microsoft.AspNetCore.Authentication.OpenIdConnect.csproj
+++ b/src/Security/Authentication/OpenIdConnect/ref/Microsoft.AspNetCore.Authentication.OpenIdConnect.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.OpenIdConnect.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.OAuth"  />
     <Reference Include="Microsoft.IdentityModel.Protocols.OpenIdConnect"  />
diff --git a/src/Security/Authentication/Twitter/ref/Microsoft.AspNetCore.Authentication.Twitter.csproj b/src/Security/Authentication/Twitter/ref/Microsoft.AspNetCore.Authentication.Twitter.csproj
index 2e94ca2f2c..b5da56a67e 100644
--- a/src/Security/Authentication/Twitter/ref/Microsoft.AspNetCore.Authentication.Twitter.csproj
+++ b/src/Security/Authentication/Twitter/ref/Microsoft.AspNetCore.Authentication.Twitter.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.Twitter.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.OAuth"  />
   </ItemGroup>
diff --git a/src/Security/Authentication/WsFederation/ref/Microsoft.AspNetCore.Authentication.WsFederation.csproj b/src/Security/Authentication/WsFederation/ref/Microsoft.AspNetCore.Authentication.WsFederation.csproj
index 3a06b3468b..f3c624b7bd 100644
--- a/src/Security/Authentication/WsFederation/ref/Microsoft.AspNetCore.Authentication.WsFederation.csproj
+++ b/src/Security/Authentication/WsFederation/ref/Microsoft.AspNetCore.Authentication.WsFederation.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authentication.WsFederation.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication"  />
     <Reference Include="Microsoft.IdentityModel.Protocols.WsFederation"  />
diff --git a/src/Security/Authorization/Core/ref/Microsoft.AspNetCore.Authorization.csproj b/src/Security/Authorization/Core/ref/Microsoft.AspNetCore.Authorization.csproj
index cb9c069202..ec07cafbaa 100644
--- a/src/Security/Authorization/Core/ref/Microsoft.AspNetCore.Authorization.csproj
+++ b/src/Security/Authorization/Core/ref/Microsoft.AspNetCore.Authorization.csproj
@@ -1,7 +1,7 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.Authorization.netstandard2.0.cs" />
@@ -9,7 +9,7 @@
     <Reference Include="Microsoft.Extensions.Logging.Abstractions"  />
     <Reference Include="Microsoft.Extensions.Options"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authorization.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Metadata"  />
     <Reference Include="Microsoft.Extensions.Logging.Abstractions"  />
diff --git a/src/Security/Authorization/Policy/ref/Microsoft.AspNetCore.Authorization.Policy.csproj b/src/Security/Authorization/Policy/ref/Microsoft.AspNetCore.Authorization.Policy.csproj
index ed754ee942..a6846ca50f 100644
--- a/src/Security/Authorization/Policy/ref/Microsoft.AspNetCore.Authorization.Policy.csproj
+++ b/src/Security/Authorization/Policy/ref/Microsoft.AspNetCore.Authorization.Policy.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Authorization.Policy.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authorization"  />
     <Reference Include="Microsoft.AspNetCore.Authentication.Abstractions"  />
diff --git a/src/Security/CookiePolicy/ref/Microsoft.AspNetCore.CookiePolicy.csproj b/src/Security/CookiePolicy/ref/Microsoft.AspNetCore.CookiePolicy.csproj
index 82a5281ed7..c0f0ce3f26 100644
--- a/src/Security/CookiePolicy/ref/Microsoft.AspNetCore.CookiePolicy.csproj
+++ b/src/Security/CookiePolicy/ref/Microsoft.AspNetCore.CookiePolicy.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.CookiePolicy.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http"  />
     <Reference Include="Microsoft.Extensions.Logging.Abstractions"  />
diff --git a/src/Servers/Connections.Abstractions/ref/Microsoft.AspNetCore.Connections.Abstractions.csproj b/src/Servers/Connections.Abstractions/ref/Microsoft.AspNetCore.Connections.Abstractions.csproj
index 4af35f0013..290b58c7fe 100644
--- a/src/Servers/Connections.Abstractions/ref/Microsoft.AspNetCore.Connections.Abstractions.csproj
+++ b/src/Servers/Connections.Abstractions/ref/Microsoft.AspNetCore.Connections.Abstractions.csproj
@@ -1,7 +1,7 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netstandard2.1;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;netstandard2.1;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.Connections.Abstractions.netstandard2.0.cs" />
@@ -16,7 +16,7 @@
     <Reference Include="Microsoft.Extensions.ActivatorUtilities.Sources"  />
     <Reference Include="System.IO.Pipelines"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Connections.Abstractions.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Http.Features"  />
     <Reference Include="Microsoft.Extensions.ActivatorUtilities.Sources"  />
diff --git a/src/Servers/HttpSys/ref/Microsoft.AspNetCore.Server.HttpSys.csproj b/src/Servers/HttpSys/ref/Microsoft.AspNetCore.Server.HttpSys.csproj
index 2808daed0a..724aaeedb1 100644
--- a/src/Servers/HttpSys/ref/Microsoft.AspNetCore.Server.HttpSys.csproj
+++ b/src/Servers/HttpSys/ref/Microsoft.AspNetCore.Server.HttpSys.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Server.HttpSys.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.Core"  />
     <Reference Include="Microsoft.AspNetCore.Connections.Abstractions"  />
diff --git a/src/Servers/IIS/IIS/ref/Microsoft.AspNetCore.Server.IIS.csproj b/src/Servers/IIS/IIS/ref/Microsoft.AspNetCore.Server.IIS.csproj
index b1d18f573f..2cfe2e86a7 100644
--- a/src/Servers/IIS/IIS/ref/Microsoft.AspNetCore.Server.IIS.csproj
+++ b/src/Servers/IIS/IIS/ref/Microsoft.AspNetCore.Server.IIS.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Server.IIS.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.Core"  />
     <Reference Include="Microsoft.AspNetCore.Connections.Abstractions"  />
diff --git a/src/Servers/IIS/IISIntegration/ref/Microsoft.AspNetCore.Server.IISIntegration.csproj b/src/Servers/IIS/IISIntegration/ref/Microsoft.AspNetCore.Server.IISIntegration.csproj
index fffc18ca75..1c8b4a1c05 100644
--- a/src/Servers/IIS/IISIntegration/ref/Microsoft.AspNetCore.Server.IISIntegration.csproj
+++ b/src/Servers/IIS/IISIntegration/ref/Microsoft.AspNetCore.Server.IISIntegration.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Server.IISIntegration.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authentication.Core"  />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
diff --git a/src/Servers/Kestrel/Core/ref/Microsoft.AspNetCore.Server.Kestrel.Core.csproj b/src/Servers/Kestrel/Core/ref/Microsoft.AspNetCore.Server.Kestrel.Core.csproj
index 6b09c8773f..e2fdde82b2 100644
--- a/src/Servers/Kestrel/Core/ref/Microsoft.AspNetCore.Server.Kestrel.Core.csproj
+++ b/src/Servers/Kestrel/Core/ref/Microsoft.AspNetCore.Server.Kestrel.Core.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Server.Kestrel.Core.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Http"  />
diff --git a/src/Servers/Kestrel/Kestrel/ref/Microsoft.AspNetCore.Server.Kestrel.csproj b/src/Servers/Kestrel/Kestrel/ref/Microsoft.AspNetCore.Server.Kestrel.csproj
index 45bdfeaffb..8ea78b2402 100644
--- a/src/Servers/Kestrel/Kestrel/ref/Microsoft.AspNetCore.Server.Kestrel.csproj
+++ b/src/Servers/Kestrel/Kestrel/ref/Microsoft.AspNetCore.Server.Kestrel.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Server.Kestrel.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting"  />
     <Reference Include="Microsoft.AspNetCore.Server.Kestrel.Core"  />
diff --git a/src/Servers/Kestrel/Transport.Libuv/ref/Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv.csproj b/src/Servers/Kestrel/Transport.Libuv/ref/Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv.csproj
index f08f21d3b9..c80557cd67 100644
--- a/src/Servers/Kestrel/Transport.Libuv/ref/Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv.csproj
+++ b/src/Servers/Kestrel/Transport.Libuv/ref/Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv.netcoreapp.cs" />
     <Reference Include="Libuv"  />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
diff --git a/src/Servers/Kestrel/Transport.Sockets/ref/Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.csproj b/src/Servers/Kestrel/Transport.Sockets/ref/Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.csproj
index f99fa6a33e..a388dfa904 100644
--- a/src/Servers/Kestrel/Transport.Sockets/ref/Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.csproj
+++ b/src/Servers/Kestrel/Transport.Sockets/ref/Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
     <Reference Include="Microsoft.AspNetCore.Connections.Abstractions"  />
diff --git a/src/SignalR/common/Http.Connections.Common/ref/Microsoft.AspNetCore.Http.Connections.Common.csproj b/src/SignalR/common/Http.Connections.Common/ref/Microsoft.AspNetCore.Http.Connections.Common.csproj
index 404a646185..9955ca7202 100644
--- a/src/SignalR/common/Http.Connections.Common/ref/Microsoft.AspNetCore.Http.Connections.Common.csproj
+++ b/src/SignalR/common/Http.Connections.Common/ref/Microsoft.AspNetCore.Http.Connections.Common.csproj
@@ -1,14 +1,14 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.Http.Connections.Common.netstandard2.0.cs" />
     <Reference Include="Microsoft.AspNetCore.Connections.Abstractions"  />
     <Reference Include="System.Text.Json"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Http.Connections.Common.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Connections.Abstractions"  />
   </ItemGroup>
diff --git a/src/SignalR/common/Http.Connections/ref/Microsoft.AspNetCore.Http.Connections.csproj b/src/SignalR/common/Http.Connections/ref/Microsoft.AspNetCore.Http.Connections.csproj
index 64f355db4b..8b474e9124 100644
--- a/src/SignalR/common/Http.Connections/ref/Microsoft.AspNetCore.Http.Connections.csproj
+++ b/src/SignalR/common/Http.Connections/ref/Microsoft.AspNetCore.Http.Connections.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.Http.Connections.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authorization.Policy"  />
     <Reference Include="Microsoft.AspNetCore.Hosting.Abstractions"  />
diff --git a/src/SignalR/common/Protocols.Json/ref/Microsoft.AspNetCore.SignalR.Protocols.Json.csproj b/src/SignalR/common/Protocols.Json/ref/Microsoft.AspNetCore.SignalR.Protocols.Json.csproj
index 0a3a34416c..94da81a8e3 100644
--- a/src/SignalR/common/Protocols.Json/ref/Microsoft.AspNetCore.SignalR.Protocols.Json.csproj
+++ b/src/SignalR/common/Protocols.Json/ref/Microsoft.AspNetCore.SignalR.Protocols.Json.csproj
@@ -1,13 +1,13 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.SignalR.Protocols.Json.netstandard2.0.cs" />
     <Reference Include="Microsoft.AspNetCore.SignalR.Common"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.SignalR.Protocols.Json.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.SignalR.Common"  />
   </ItemGroup>
diff --git a/src/SignalR/common/SignalR.Common/ref/Microsoft.AspNetCore.SignalR.Common.csproj b/src/SignalR/common/SignalR.Common/ref/Microsoft.AspNetCore.SignalR.Common.csproj
index 8661f38515..fdc6d747c7 100644
--- a/src/SignalR/common/SignalR.Common/ref/Microsoft.AspNetCore.SignalR.Common.csproj
+++ b/src/SignalR/common/SignalR.Common/ref/Microsoft.AspNetCore.SignalR.Common.csproj
@@ -1,7 +1,7 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <Compile Include="Microsoft.AspNetCore.SignalR.Common.netstandard2.0.cs" />
@@ -9,7 +9,7 @@
     <Reference Include="Microsoft.Extensions.Options"  />
     <Reference Include="System.Text.Json"  />
   </ItemGroup>
-<ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+<ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.SignalR.Common.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Connections.Abstractions"  />
     <Reference Include="Microsoft.Extensions.Options"  />
diff --git a/src/SignalR/server/Core/ref/Microsoft.AspNetCore.SignalR.Core.csproj b/src/SignalR/server/Core/ref/Microsoft.AspNetCore.SignalR.Core.csproj
index 1e1bff0199..6416b75d2e 100644
--- a/src/SignalR/server/Core/ref/Microsoft.AspNetCore.SignalR.Core.csproj
+++ b/src/SignalR/server/Core/ref/Microsoft.AspNetCore.SignalR.Core.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.SignalR.Core.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.Authorization.Policy"  />
     <Reference Include="Microsoft.AspNetCore.SignalR.Common"  />
diff --git a/src/SignalR/server/SignalR/ref/Microsoft.AspNetCore.SignalR.csproj b/src/SignalR/server/SignalR/ref/Microsoft.AspNetCore.SignalR.csproj
index fd90727f77..7e293580fb 100644
--- a/src/SignalR/server/SignalR/ref/Microsoft.AspNetCore.SignalR.csproj
+++ b/src/SignalR/server/SignalR/ref/Microsoft.AspNetCore.SignalR.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.SignalR.netcoreapp.cs" />
     <Reference Include="Microsoft.AspNetCore.SignalR.Core"  />
     <Reference Include="Microsoft.AspNetCore.Http.Connections"  />
diff --git a/src/SignalR/server/StackExchangeRedis/ref/Microsoft.AspNetCore.SignalR.StackExchangeRedis.csproj b/src/SignalR/server/StackExchangeRedis/ref/Microsoft.AspNetCore.SignalR.StackExchangeRedis.csproj
index e19f3506ad..107b56273a 100644
--- a/src/SignalR/server/StackExchangeRedis/ref/Microsoft.AspNetCore.SignalR.StackExchangeRedis.csproj
+++ b/src/SignalR/server/StackExchangeRedis/ref/Microsoft.AspNetCore.SignalR.StackExchangeRedis.csproj
@@ -1,9 +1,9 @@
 <!-- This file is automatically generated. -->
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <Compile Include="Microsoft.AspNetCore.SignalR.StackExchangeRedis.netcoreapp.cs" />
     <Reference Include="Microsoft.Extensions.Options"  />
     <Reference Include="StackExchange.Redis"  />