diff --git a/eng/Workarounds.targets b/eng/Workarounds.targets
index 62ecd5baee..32f68d1bc3 100644
--- a/eng/Workarounds.targets
+++ b/eng/Workarounds.targets
@@ -9,7 +9,7 @@
     <!-- Reference base shared framework at incoming dependency flow version, not bundled sdk version. -->
     <FrameworkReference
       Update="Microsoft.NETCore.App"
-      Condition="'$(TargetFramework)' == 'netcoreapp3.1'"
+      Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'"
       RuntimeFrameworkVersion="$(MicrosoftNETCoreAppRuntimeVersion)"
       TargetingPackVersion="$(MicrosoftNETCoreAppRefPackageVersion)"
       />
diff --git a/eng/tools/BaselineGenerator/BaselineGenerator.csproj b/eng/tools/BaselineGenerator/BaselineGenerator.csproj
index 143b3063d7..082a9eaf02 100644
--- a/eng/tools/BaselineGenerator/BaselineGenerator.csproj
+++ b/eng/tools/BaselineGenerator/BaselineGenerator.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>$(DefaultNetCoreTargetFramework)</TargetFramework>
     <StartArguments>-s https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json</StartArguments>
     <StartWorkingDirectory>$(MSBuildThisFileDirectory)../../</StartWorkingDirectory>
   </PropertyGroup>
diff --git a/eng/tools/RepoTasks/RepoTasks.csproj b/eng/tools/RepoTasks/RepoTasks.csproj
index a954207698..5bef776106 100644
--- a/eng/tools/RepoTasks/RepoTasks.csproj
+++ b/eng/tools/RepoTasks/RepoTasks.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
     <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">$(TargetFrameworks);net472</TargetFrameworks>
     <DefineConstants Condition="'$(TargetFramework)' == 'net472'">$(DefineConstants);BUILD_MSI_TASKS</DefineConstants>
     <Optimize>false</Optimize>
@@ -16,7 +16,7 @@
     <PackageReference Include="Microsoft.Extensions.DependencyModel" Version="2.1.0" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <PackageReference Include="Microsoft.Build.Framework" Version="15.8.166" />
     <PackageReference Include="Microsoft.Build.Tasks.Core" Version="15.8.166" />
     <PackageReference Include="Microsoft.Build.Utilities.Core" Version="15.8.166" />
diff --git a/src/Framework/src/Microsoft.AspNetCore.App.Runtime.csproj b/src/Framework/src/Microsoft.AspNetCore.App.Runtime.csproj
index 633be490c2..4c4298a92d 100644
--- a/src/Framework/src/Microsoft.AspNetCore.App.Runtime.csproj
+++ b/src/Framework/src/Microsoft.AspNetCore.App.Runtime.csproj
@@ -25,7 +25,7 @@ This package is an internal implementation of the .NET Core SDK and is not meant
     <BaseRuntimeVersionFileName>aspnetcore_base_runtime.version</BaseRuntimeVersionFileName>
     <BaseRuntimeVersionFileOutputPath>$(InstallersOutputPath)$(BaseRuntimeVersionFileName)</BaseRuntimeVersionFileOutputPath>
 
-    <!-- NuGet appends target framework to this value. Example: runtimes/win-x64/lib/netcoreapp3.1/ -->
+    <!-- NuGet appends target framework to this value. Example: runtimes/win-x64/lib/netcoreappX.Y/ -->
     <BuildOutputTargetFolder>runtimes/$(RuntimeIdentifier)/lib/</BuildOutputTargetFolder>
     <!-- We still need the native path to these assets though for the RuntimeList.xml manifest -->
     <ManagedAssetsPackagePath>$(BuildOutputTargetFolder)$(DefaultNetCoreTargetFramework)</ManagedAssetsPackagePath>
diff --git a/src/ProjectTemplates/test/BlazorServerTemplateTest.cs b/src/ProjectTemplates/test/BlazorServerTemplateTest.cs
index bf9fe12f2c..463b710ac3 100644
--- a/src/ProjectTemplates/test/BlazorServerTemplateTest.cs
+++ b/src/ProjectTemplates/test/BlazorServerTemplateTest.cs
@@ -36,7 +36,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
@@ -93,7 +93,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
diff --git a/src/ProjectTemplates/test/EmptyWebTemplateTest.cs b/src/ProjectTemplates/test/EmptyWebTemplateTest.cs
index 64f5d8cf3e..c6fb6dfeeb 100644
--- a/src/ProjectTemplates/test/EmptyWebTemplateTest.cs
+++ b/src/ProjectTemplates/test/EmptyWebTemplateTest.cs
@@ -36,7 +36,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
diff --git a/src/ProjectTemplates/test/IdentityUIPackageTest.cs b/src/ProjectTemplates/test/IdentityUIPackageTest.cs
index 204c560859..deede64521 100644
--- a/src/ProjectTemplates/test/IdentityUIPackageTest.cs
+++ b/src/ProjectTemplates/test/IdentityUIPackageTest.cs
@@ -134,7 +134,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync(packageOptions: packageOptions);
diff --git a/src/ProjectTemplates/test/MvcTemplateTest.cs b/src/ProjectTemplates/test/MvcTemplateTest.cs
index 0ec1c9e01e..7c5306fa3e 100644
--- a/src/ProjectTemplates/test/MvcTemplateTest.cs
+++ b/src/ProjectTemplates/test/MvcTemplateTest.cs
@@ -48,7 +48,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
@@ -116,7 +116,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
diff --git a/src/ProjectTemplates/test/RazorClassLibraryTemplateTest.cs b/src/ProjectTemplates/test/RazorClassLibraryTemplateTest.cs
index 8186ab4156..0d02a56f8f 100644
--- a/src/ProjectTemplates/test/RazorClassLibraryTemplateTest.cs
+++ b/src/ProjectTemplates/test/RazorClassLibraryTemplateTest.cs
@@ -33,7 +33,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
@@ -52,7 +52,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
diff --git a/src/ProjectTemplates/test/RazorPagesTemplateTest.cs b/src/ProjectTemplates/test/RazorPagesTemplateTest.cs
index 637d7179b5..94bfe38d18 100644
--- a/src/ProjectTemplates/test/RazorPagesTemplateTest.cs
+++ b/src/ProjectTemplates/test/RazorPagesTemplateTest.cs
@@ -45,7 +45,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, createResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
@@ -115,7 +115,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
diff --git a/src/ProjectTemplates/test/SpaTemplateTest/SpaTemplateTestBase.cs b/src/ProjectTemplates/test/SpaTemplateTest/SpaTemplateTestBase.cs
index 700349b773..1826b5a4eb 100644
--- a/src/ProjectTemplates/test/SpaTemplateTest/SpaTemplateTestBase.cs
+++ b/src/ProjectTemplates/test/SpaTemplateTest/SpaTemplateTestBase.cs
@@ -76,7 +76,7 @@ namespace Templates.Test.SpaTemplateTest
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             using var buildResult = await Project.RunDotNetBuildAsync();
diff --git a/src/ProjectTemplates/test/WebApiTemplateTest.cs b/src/ProjectTemplates/test/WebApiTemplateTest.cs
index 8e08db9068..39ca4adcf5 100644
--- a/src/ProjectTemplates/test/WebApiTemplateTest.cs
+++ b/src/ProjectTemplates/test/WebApiTemplateTest.cs
@@ -36,7 +36,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
diff --git a/src/ProjectTemplates/test/WorkerTemplateTest.cs b/src/ProjectTemplates/test/WorkerTemplateTest.cs
index fbe88be770..738eafc61d 100644
--- a/src/ProjectTemplates/test/WorkerTemplateTest.cs
+++ b/src/ProjectTemplates/test/WorkerTemplateTest.cs
@@ -32,7 +32,7 @@ namespace Templates.Test
             Assert.True(0 == publishResult.ExitCode, ErrorMessages.GetFailedProcessMessage("publish", Project, publishResult));
 
             // Run dotnet build after publish. The reason is that one uses Config = Debug and the other uses Config = Release
-            // The output from publish will go into bin/Release/netcoreapp3.1/publish and won't be affected by calling build
+            // The output from publish will go into bin/Release/netcoreappX.Y/publish and won't be affected by calling build
             // later, while the opposite is not true.
 
             var buildResult = await Project.RunDotNetBuildAsync();
diff --git a/src/Servers/IIS/IntegrationTesting.IIS/src/IISExpressDeployer.cs b/src/Servers/IIS/IntegrationTesting.IIS/src/IISExpressDeployer.cs
index 4206ab8f22..e408a22b69 100644
--- a/src/Servers/IIS/IntegrationTesting.IIS/src/IISExpressDeployer.cs
+++ b/src/Servers/IIS/IntegrationTesting.IIS/src/IISExpressDeployer.cs
@@ -51,7 +51,7 @@ namespace Microsoft.AspNetCore.Server.IntegrationTesting.IIS
                 // Start timer
                 StartTimer();
 
-                // For an unpublished application the dllroot points pre-built dlls like projectdir/bin/debug/netcoreapp3.1/
+                // For an unpublished application the dllroot points pre-built dlls like projectdir/bin/debug/netcoreappX.Y/
                 // and contentRoot points to the project directory so you get things like static assets.
                 // For a published app both point to the publish directory.
                 var dllRoot = CheckIfPublishIsRequired();
diff --git a/src/SignalR/common/Http.Connections/src/Internal/Transports/WebSocketsServerTransport.cs b/src/SignalR/common/Http.Connections/src/Internal/Transports/WebSocketsServerTransport.cs
index ef54b75288..d5c2c1fefb 100644
--- a/src/SignalR/common/Http.Connections/src/Internal/Transports/WebSocketsServerTransport.cs
+++ b/src/SignalR/common/Http.Connections/src/Internal/Transports/WebSocketsServerTransport.cs
@@ -155,7 +155,8 @@ namespace Microsoft.AspNetCore.Http.Connections.Internal.Transports
                     var memory = _application.Output.GetMemory();
 
                     var receiveResult = await socket.ReceiveAsync(memory, token);
-                    // Need to check again for netcoreapp3.1 because a close can happen between a 0-byte read and the actual read
+
+                    // Need to check again for netcoreapp3.0 and later because a close can happen between a 0-byte read and the actual read
                     if (receiveResult.MessageType == WebSocketMessageType.Close)
                     {
                         return;