diff --git a/build/common.props b/build/common.props
index 189103e012..4ad7c5d439 100644
--- a/build/common.props
+++ b/build/common.props
@@ -16,8 +16,8 @@
     <PackageReference Include="Internal.AspNetCore.Sdk" Version="$(InternalAspNetCoreSdkVersion)" PrivateAssets="All" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFrameworkIdentifier)'=='.NETFramework' AND '$(OutputType)'=='library'">
-    <PackageReference Include="NETStandard.Library" Version="$(BundledNETStandardPackageVersion)" />
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)'=='.NETFramework'">
+    <PackageReference Include="NETStandard.Library.NETFramework" Version="$(NETStandardLibraryNETFrameworkVersion)" />
   </ItemGroup>
 
 </Project>
diff --git a/build/dependencies.props b/build/dependencies.props
index 219cab970e..6357e113ef 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -8,7 +8,7 @@
     <InternalAspNetCoreSdkVersion>2.1.0-*</InternalAspNetCoreSdkVersion>
     <JsonNetBsonVersion>1.0.1</JsonNetBsonVersion>
     <MoqVersion>4.7.1</MoqVersion>
-    <NETStandardImplicitPackageVersion>$(BundledNETStandardPackageVersion)</NETStandardImplicitPackageVersion>
+    <NETStandardLibraryNETFrameworkVersion>2.0.0-*</NETStandardLibraryNETFrameworkVersion>
     <RoslynVersion>2.0.0</RoslynVersion>
     <TestSdkVersion>15.3.0-*</TestSdkVersion>
     <WebApiClientVersion>5.2.2</WebApiClientVersion>
diff --git a/samples/MvcSandbox/MvcSandbox.csproj b/samples/MvcSandbox/MvcSandbox.csproj
index 73bfea077f..cbeca10954 100644
--- a/samples/MvcSandbox/MvcSandbox.csproj
+++ b/samples/MvcSandbox/MvcSandbox.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Microsoft.AspNetCore.Mvc.Abstractions/Microsoft.AspNetCore.Mvc.Abstractions.csproj b/src/Microsoft.AspNetCore.Mvc.Abstractions/Microsoft.AspNetCore.Mvc.Abstractions.csproj
index f6dcb4ff5b..f7420d0d75 100644
--- a/src/Microsoft.AspNetCore.Mvc.Abstractions/Microsoft.AspNetCore.Mvc.Abstractions.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.Abstractions/Microsoft.AspNetCore.Mvc.Abstractions.csproj
@@ -6,7 +6,7 @@
     <Description>ASP.NET Core MVC abstractions and interfaces for action invocation and dispatching, authorization, action filters, formatters, model binding, routing, validation, and more.
 Commonly used types:
 Microsoft.AspNetCore.Mvc.IActionResult</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.ApiExplorer/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj b/src/Microsoft.AspNetCore.Mvc.ApiExplorer/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj
index 74d3a63dd9..ac9ee6fb06 100644
--- a/src/Microsoft.AspNetCore.Mvc.ApiExplorer/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.ApiExplorer/Microsoft.AspNetCore.Mvc.ApiExplorer.csproj
@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core MVC API explorer functionality for discovering metadata such as the list of controllers and actions, and their URLs and allowed HTTP methods.</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.Core/Microsoft.AspNetCore.Mvc.Core.csproj b/src/Microsoft.AspNetCore.Mvc.Core/Microsoft.AspNetCore.Mvc.Core.csproj
index 19783101eb..540895d096 100644
--- a/src/Microsoft.AspNetCore.Mvc.Core/Microsoft.AspNetCore.Mvc.Core.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.Core/Microsoft.AspNetCore.Mvc.Core.csproj
@@ -12,7 +12,7 @@ Microsoft.AspNetCore.Mvc.FromBodyAttribute
 Microsoft.AspNetCore.Mvc.FromFormAttribute
 Microsoft.AspNetCore.Mvc.RequireHttpsAttribute
 Microsoft.AspNetCore.Mvc.RouteAttribute</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.Cors/Microsoft.AspNetCore.Mvc.Cors.csproj b/src/Microsoft.AspNetCore.Mvc.Cors/Microsoft.AspNetCore.Mvc.Cors.csproj
index 31ba4048a4..ec8a738b8b 100644
--- a/src/Microsoft.AspNetCore.Mvc.Cors/Microsoft.AspNetCore.Mvc.Cors.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.Cors/Microsoft.AspNetCore.Mvc.Cors.csproj
@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core MVC cross-origin resource sharing (CORS) features.</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc;cors</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.DataAnnotations/Microsoft.AspNetCore.Mvc.DataAnnotations.csproj b/src/Microsoft.AspNetCore.Mvc.DataAnnotations/Microsoft.AspNetCore.Mvc.DataAnnotations.csproj
index 684800eb4d..526abe375f 100644
--- a/src/Microsoft.AspNetCore.Mvc.DataAnnotations/Microsoft.AspNetCore.Mvc.DataAnnotations.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.DataAnnotations/Microsoft.AspNetCore.Mvc.DataAnnotations.csproj
@@ -3,7 +3,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core MVC metadata and validation system using System.ComponentModel.DataAnnotations.</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.Formatters.Json/Microsoft.AspNetCore.Mvc.Formatters.Json.csproj b/src/Microsoft.AspNetCore.Mvc.Formatters.Json/Microsoft.AspNetCore.Mvc.Formatters.Json.csproj
index e6c290a4d2..f3227c0ce4 100644
--- a/src/Microsoft.AspNetCore.Mvc.Formatters.Json/Microsoft.AspNetCore.Mvc.Formatters.Json.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.Formatters.Json/Microsoft.AspNetCore.Mvc.Formatters.Json.csproj
@@ -3,7 +3,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core MVC formatters for JSON input and output and for JSON PATCH input using Json.NET.</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc;json</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.Formatters.Xml/Microsoft.AspNetCore.Mvc.Formatters.Xml.csproj b/src/Microsoft.AspNetCore.Mvc.Formatters.Xml/Microsoft.AspNetCore.Mvc.Formatters.Xml.csproj
index 7318907821..f32a057b54 100644
--- a/src/Microsoft.AspNetCore.Mvc.Formatters.Xml/Microsoft.AspNetCore.Mvc.Formatters.Xml.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.Formatters.Xml/Microsoft.AspNetCore.Mvc.Formatters.Xml.csproj
@@ -3,7 +3,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core MVC formatters for XML input and output using DataContractSerializer and XmlSerializer.</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc;xml</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.Localization/Microsoft.AspNetCore.Mvc.Localization.csproj b/src/Microsoft.AspNetCore.Mvc.Localization/Microsoft.AspNetCore.Mvc.Localization.csproj
index c1300ed8c3..c8b04c3771 100644
--- a/src/Microsoft.AspNetCore.Mvc.Localization/Microsoft.AspNetCore.Mvc.Localization.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.Localization/Microsoft.AspNetCore.Mvc.Localization.csproj
@@ -7,7 +7,7 @@
 Commonly used types:
 Microsoft.AspNetCore.Mvc.Localization.IHtmlLocalizer&lt;TResource&gt;
 Microsoft.AspNetCore.Mvc.Localization.IViewLocalizer</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc;localization</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.Razor/Microsoft.AspNetCore.Mvc.Razor.csproj b/src/Microsoft.AspNetCore.Mvc.Razor/Microsoft.AspNetCore.Mvc.Razor.csproj
index 4fb71332ad..a88cf75224 100644
--- a/src/Microsoft.AspNetCore.Mvc.Razor/Microsoft.AspNetCore.Mvc.Razor.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.Razor/Microsoft.AspNetCore.Mvc.Razor.csproj
@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core MVC Razor view engine for CSHTML files.</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc;cshtml;razor</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.RazorPages/Microsoft.AspNetCore.Mvc.RazorPages.csproj b/src/Microsoft.AspNetCore.Mvc.RazorPages/Microsoft.AspNetCore.Mvc.RazorPages.csproj
index a98158015c..883f50a639 100644
--- a/src/Microsoft.AspNetCore.Mvc.RazorPages/Microsoft.AspNetCore.Mvc.RazorPages.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.RazorPages/Microsoft.AspNetCore.Mvc.RazorPages.csproj
@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core MVC Razor Pages.</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc;cshtml;razor</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.TagHelpers/Microsoft.AspNetCore.Mvc.TagHelpers.csproj b/src/Microsoft.AspNetCore.Mvc.TagHelpers/Microsoft.AspNetCore.Mvc.TagHelpers.csproj
index 610e090fef..4864a2f9e4 100644
--- a/src/Microsoft.AspNetCore.Mvc.TagHelpers/Microsoft.AspNetCore.Mvc.TagHelpers.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.TagHelpers/Microsoft.AspNetCore.Mvc.TagHelpers.csproj
@@ -3,7 +3,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core MVC default tag helpers. Contains tag helpers for anchor tags, HTML input elements, caching, scripts, links (for CSS), and more.</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc;taghelper;taghelpers</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc.ViewFeatures/Microsoft.AspNetCore.Mvc.ViewFeatures.csproj b/src/Microsoft.AspNetCore.Mvc.ViewFeatures/Microsoft.AspNetCore.Mvc.ViewFeatures.csproj
index 580a35bf93..5822fde80d 100644
--- a/src/Microsoft.AspNetCore.Mvc.ViewFeatures/Microsoft.AspNetCore.Mvc.ViewFeatures.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.ViewFeatures/Microsoft.AspNetCore.Mvc.ViewFeatures.csproj
@@ -8,7 +8,7 @@ Commonly used types:
 Microsoft.AspNetCore.Mvc.Controller
 Microsoft.AspNetCore.Mvc.ValidateAntiForgeryTokenAttribute
 Microsoft.AspNetCore.Mvc.ViewComponent</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/src/Microsoft.AspNetCore.Mvc.WebApiCompatShim/Microsoft.AspNetCore.Mvc.WebApiCompatShim.csproj b/src/Microsoft.AspNetCore.Mvc.WebApiCompatShim/Microsoft.AspNetCore.Mvc.WebApiCompatShim.csproj
index 77b704dcd0..9767587b7e 100644
--- a/src/Microsoft.AspNetCore.Mvc.WebApiCompatShim/Microsoft.AspNetCore.Mvc.WebApiCompatShim.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.WebApiCompatShim/Microsoft.AspNetCore.Mvc.WebApiCompatShim.csproj
@@ -6,7 +6,7 @@
     <Description>Provides compatibility in ASP.NET Core MVC with ASP.NET Web API 2 to simplify migration of existing Web API implementations.
 Commonly used types:
 System.Web.Http.ApiController</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc;aspnetwebapi</PackageTags>
diff --git a/src/Microsoft.AspNetCore.Mvc/Microsoft.AspNetCore.Mvc.csproj b/src/Microsoft.AspNetCore.Mvc/Microsoft.AspNetCore.Mvc.csproj
index 18ebd24d94..1d110dc885 100644
--- a/src/Microsoft.AspNetCore.Mvc/Microsoft.AspNetCore.Mvc.csproj
+++ b/src/Microsoft.AspNetCore.Mvc/Microsoft.AspNetCore.Mvc.csproj
@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core MVC is a web framework that gives you a powerful, patterns-based way to build dynamic websites and web APIs. ASP.NET Core MVC enables a clean separation of concerns and gives you full control over markup.</Description>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc</PackageTags>
diff --git a/test/Microsoft.AspNetCore.Mvc.Abstractions.Test/Microsoft.AspNetCore.Mvc.Abstractions.Test.csproj b/test/Microsoft.AspNetCore.Mvc.Abstractions.Test/Microsoft.AspNetCore.Mvc.Abstractions.Test.csproj
index 71da275693..38799afb30 100644
--- a/test/Microsoft.AspNetCore.Mvc.Abstractions.Test/Microsoft.AspNetCore.Mvc.Abstractions.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.Abstractions.Test/Microsoft.AspNetCore.Mvc.Abstractions.Test.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.ApiExplorer.Test/Microsoft.AspNetCore.Mvc.ApiExplorer.Test.csproj b/test/Microsoft.AspNetCore.Mvc.ApiExplorer.Test/Microsoft.AspNetCore.Mvc.ApiExplorer.Test.csproj
index 5ee38a7cc6..54f2e4b353 100644
--- a/test/Microsoft.AspNetCore.Mvc.ApiExplorer.Test/Microsoft.AspNetCore.Mvc.ApiExplorer.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.ApiExplorer.Test/Microsoft.AspNetCore.Mvc.ApiExplorer.Test.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.Core.Test/Microsoft.AspNetCore.Mvc.Core.Test.csproj b/test/Microsoft.AspNetCore.Mvc.Core.Test/Microsoft.AspNetCore.Mvc.Core.Test.csproj
index 0256846f9b..592a70c889 100644
--- a/test/Microsoft.AspNetCore.Mvc.Core.Test/Microsoft.AspNetCore.Mvc.Core.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.Core.Test/Microsoft.AspNetCore.Mvc.Core.Test.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <PreserveCompilationContext>true</PreserveCompilationContext>
   </PropertyGroup>
 
diff --git a/test/Microsoft.AspNetCore.Mvc.Cors.Test/Microsoft.AspNetCore.Mvc.Cors.Test.csproj b/test/Microsoft.AspNetCore.Mvc.Cors.Test/Microsoft.AspNetCore.Mvc.Cors.Test.csproj
index 2f3a49a544..9d2dd40aee 100644
--- a/test/Microsoft.AspNetCore.Mvc.Cors.Test/Microsoft.AspNetCore.Mvc.Cors.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.Cors.Test/Microsoft.AspNetCore.Mvc.Cors.Test.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.DataAnnotations.Test/Microsoft.AspNetCore.Mvc.DataAnnotations.Test.csproj b/test/Microsoft.AspNetCore.Mvc.DataAnnotations.Test/Microsoft.AspNetCore.Mvc.DataAnnotations.Test.csproj
index 8e7e827244..1e7aba086b 100644
--- a/test/Microsoft.AspNetCore.Mvc.DataAnnotations.Test/Microsoft.AspNetCore.Mvc.DataAnnotations.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.DataAnnotations.Test/Microsoft.AspNetCore.Mvc.DataAnnotations.Test.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.Formatters.Json.Test/Microsoft.AspNetCore.Mvc.Formatters.Json.Test.csproj b/test/Microsoft.AspNetCore.Mvc.Formatters.Json.Test/Microsoft.AspNetCore.Mvc.Formatters.Json.Test.csproj
index d066071f33..bdbbe40c8f 100644
--- a/test/Microsoft.AspNetCore.Mvc.Formatters.Json.Test/Microsoft.AspNetCore.Mvc.Formatters.Json.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.Formatters.Json.Test/Microsoft.AspNetCore.Mvc.Formatters.Json.Test.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.Formatters.Xml.Test/Microsoft.AspNetCore.Mvc.Formatters.Xml.Test.csproj b/test/Microsoft.AspNetCore.Mvc.Formatters.Xml.Test/Microsoft.AspNetCore.Mvc.Formatters.Xml.Test.csproj
index 14b99ce22a..19f6b4ef95 100644
--- a/test/Microsoft.AspNetCore.Mvc.Formatters.Xml.Test/Microsoft.AspNetCore.Mvc.Formatters.Xml.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.Formatters.Xml.Test/Microsoft.AspNetCore.Mvc.Formatters.Xml.Test.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.FunctionalTests/Microsoft.AspNetCore.Mvc.FunctionalTests.csproj b/test/Microsoft.AspNetCore.Mvc.FunctionalTests/Microsoft.AspNetCore.Mvc.FunctionalTests.csproj
index 656d977670..9c5d44ad52 100644
--- a/test/Microsoft.AspNetCore.Mvc.FunctionalTests/Microsoft.AspNetCore.Mvc.FunctionalTests.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.FunctionalTests/Microsoft.AspNetCore.Mvc.FunctionalTests.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <PackageTargetFallback>$(PackageTargetFallback);portable-net451+win8</PackageTargetFallback>
 
     <DefineConstants Condition="'$(GenerateBaselines)'=='true'">$(DefineConstants);GENERATE_BASELINES</DefineConstants>
diff --git a/test/Microsoft.AspNetCore.Mvc.IntegrationTests/Microsoft.AspNetCore.Mvc.IntegrationTests.csproj b/test/Microsoft.AspNetCore.Mvc.IntegrationTests/Microsoft.AspNetCore.Mvc.IntegrationTests.csproj
index cfcef15176..9328557bd0 100644
--- a/test/Microsoft.AspNetCore.Mvc.IntegrationTests/Microsoft.AspNetCore.Mvc.IntegrationTests.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.IntegrationTests/Microsoft.AspNetCore.Mvc.IntegrationTests.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.Localization.Test/Microsoft.AspNetCore.Mvc.Localization.Test.csproj b/test/Microsoft.AspNetCore.Mvc.Localization.Test/Microsoft.AspNetCore.Mvc.Localization.Test.csproj
index 2d78ad381a..6bc161b874 100644
--- a/test/Microsoft.AspNetCore.Mvc.Localization.Test/Microsoft.AspNetCore.Mvc.Localization.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.Localization.Test/Microsoft.AspNetCore.Mvc.Localization.Test.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.Performance/Microsoft.AspNetCore.Mvc.Performance.csproj b/test/Microsoft.AspNetCore.Mvc.Performance/Microsoft.AspNetCore.Mvc.Performance.csproj
index 10687fb2ff..e1798664e5 100644
--- a/test/Microsoft.AspNetCore.Mvc.Performance/Microsoft.AspNetCore.Mvc.Performance.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.Performance/Microsoft.AspNetCore.Mvc.Performance.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <OutputType>Exe</OutputType>
     <ServerGarbageCollection>true</ServerGarbageCollection>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/test/Microsoft.AspNetCore.Mvc.Razor.Test/Microsoft.AspNetCore.Mvc.Razor.Test.csproj b/test/Microsoft.AspNetCore.Mvc.Razor.Test/Microsoft.AspNetCore.Mvc.Razor.Test.csproj
index 076755e664..f3265a94f5 100644
--- a/test/Microsoft.AspNetCore.Mvc.Razor.Test/Microsoft.AspNetCore.Mvc.Razor.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.Razor.Test/Microsoft.AspNetCore.Mvc.Razor.Test.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <PreserveCompilationContext>true</PreserveCompilationContext>
     <DefineConstants>$(DefineConstants);SOME_TEST_DEFINE</DefineConstants>
   </PropertyGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.RazorPages.Test/Microsoft.AspNetCore.Mvc.RazorPages.Test.csproj b/test/Microsoft.AspNetCore.Mvc.RazorPages.Test/Microsoft.AspNetCore.Mvc.RazorPages.Test.csproj
index b3c70be73c..74c39bd7a5 100644
--- a/test/Microsoft.AspNetCore.Mvc.RazorPages.Test/Microsoft.AspNetCore.Mvc.RazorPages.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.RazorPages.Test/Microsoft.AspNetCore.Mvc.RazorPages.Test.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.TagHelpers.Test/Microsoft.AspNetCore.Mvc.TagHelpers.Test.csproj b/test/Microsoft.AspNetCore.Mvc.TagHelpers.Test/Microsoft.AspNetCore.Mvc.TagHelpers.Test.csproj
index cc570affeb..67c68ba33d 100644
--- a/test/Microsoft.AspNetCore.Mvc.TagHelpers.Test/Microsoft.AspNetCore.Mvc.TagHelpers.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.TagHelpers.Test/Microsoft.AspNetCore.Mvc.TagHelpers.Test.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.Test/Microsoft.AspNetCore.Mvc.Test.csproj b/test/Microsoft.AspNetCore.Mvc.Test/Microsoft.AspNetCore.Mvc.Test.csproj
index e373c1ac78..abd462e5f2 100644
--- a/test/Microsoft.AspNetCore.Mvc.Test/Microsoft.AspNetCore.Mvc.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.Test/Microsoft.AspNetCore.Mvc.Test.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.TestCommon/Microsoft.AspNetCore.Mvc.TestCommon.csproj b/test/Microsoft.AspNetCore.Mvc.TestCommon/Microsoft.AspNetCore.Mvc.TestCommon.csproj
index a382b7a420..b5780f1328 100644
--- a/test/Microsoft.AspNetCore.Mvc.TestCommon/Microsoft.AspNetCore.Mvc.TestCommon.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.TestCommon/Microsoft.AspNetCore.Mvc.TestCommon.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.TestDiagnosticListener/Microsoft.AspNetCore.Mvc.TestDiagnosticListener.csproj b/test/Microsoft.AspNetCore.Mvc.TestDiagnosticListener/Microsoft.AspNetCore.Mvc.TestDiagnosticListener.csproj
index 6b001eefe3..10be834a43 100644
--- a/test/Microsoft.AspNetCore.Mvc.TestDiagnosticListener/Microsoft.AspNetCore.Mvc.TestDiagnosticListener.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.TestDiagnosticListener/Microsoft.AspNetCore.Mvc.TestDiagnosticListener.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test.csproj b/test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test.csproj
index bd92d574f3..080bf07fc9 100644
--- a/test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test/Microsoft.AspNetCore.Mvc.ViewFeatures.Test.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest.csproj b/test/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest.csproj
index 402a619bc5..823cb6bbf3 100644
--- a/test/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <PackageTargetFallback>$(PackageTargetFallback);portable-net451+win8</PackageTargetFallback>
   </PropertyGroup>
 
diff --git a/test/WebSites/ApiExplorerWebSite/ApiExplorerWebSite.csproj b/test/WebSites/ApiExplorerWebSite/ApiExplorerWebSite.csproj
index d5348fe27d..347d0f902c 100644
--- a/test/WebSites/ApiExplorerWebSite/ApiExplorerWebSite.csproj
+++ b/test/WebSites/ApiExplorerWebSite/ApiExplorerWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/ApplicationModelWebSite/ApplicationModelWebSite.csproj b/test/WebSites/ApplicationModelWebSite/ApplicationModelWebSite.csproj
index e5f3d753a5..888f6267fc 100644
--- a/test/WebSites/ApplicationModelWebSite/ApplicationModelWebSite.csproj
+++ b/test/WebSites/ApplicationModelWebSite/ApplicationModelWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/BasicWebSite/BasicWebSite.csproj b/test/WebSites/BasicWebSite/BasicWebSite.csproj
index e5ee5784fa..7df18281ad 100644
--- a/test/WebSites/BasicWebSite/BasicWebSite.csproj
+++ b/test/WebSites/BasicWebSite/BasicWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/ControllersFromServicesClassLibrary/ControllersFromServicesClassLibrary.csproj b/test/WebSites/ControllersFromServicesClassLibrary/ControllersFromServicesClassLibrary.csproj
index 86c92b0676..2d0e1ae53e 100644
--- a/test/WebSites/ControllersFromServicesClassLibrary/ControllersFromServicesClassLibrary.csproj
+++ b/test/WebSites/ControllersFromServicesClassLibrary/ControllersFromServicesClassLibrary.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <PreserveCompilationContext>true</PreserveCompilationContext>
   </PropertyGroup>
 
diff --git a/test/WebSites/ControllersFromServicesWebSite/ControllersFromServicesWebSite.csproj b/test/WebSites/ControllersFromServicesWebSite/ControllersFromServicesWebSite.csproj
index ebdcc81926..8802766c15 100644
--- a/test/WebSites/ControllersFromServicesWebSite/ControllersFromServicesWebSite.csproj
+++ b/test/WebSites/ControllersFromServicesWebSite/ControllersFromServicesWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/CorsWebSite/CorsWebSite.csproj b/test/WebSites/CorsWebSite/CorsWebSite.csproj
index 12f19d31a4..b64cc19020 100644
--- a/test/WebSites/CorsWebSite/CorsWebSite.csproj
+++ b/test/WebSites/CorsWebSite/CorsWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/ErrorPageMiddlewareWebSite/ErrorPageMiddlewareWebSite.csproj b/test/WebSites/ErrorPageMiddlewareWebSite/ErrorPageMiddlewareWebSite.csproj
index 7b0616f9a7..b44c9f43fd 100644
--- a/test/WebSites/ErrorPageMiddlewareWebSite/ErrorPageMiddlewareWebSite.csproj
+++ b/test/WebSites/ErrorPageMiddlewareWebSite/ErrorPageMiddlewareWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/FSharpWebSite/FSharpWebSite.fsproj b/test/WebSites/FSharpWebSite/FSharpWebSite.fsproj
index 5b250bab5f..3727a0472a 100644
--- a/test/WebSites/FSharpWebSite/FSharpWebSite.fsproj
+++ b/test/WebSites/FSharpWebSite/FSharpWebSite.fsproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\dependencies.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/test/WebSites/FilesWebSite/FilesWebSite.csproj b/test/WebSites/FilesWebSite/FilesWebSite.csproj
index 6fe0250664..c06de41ab0 100644
--- a/test/WebSites/FilesWebSite/FilesWebSite.csproj
+++ b/test/WebSites/FilesWebSite/FilesWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/FiltersWebSite/FiltersWebSite.csproj b/test/WebSites/FiltersWebSite/FiltersWebSite.csproj
index 21f2ea538e..27414d1e83 100644
--- a/test/WebSites/FiltersWebSite/FiltersWebSite.csproj
+++ b/test/WebSites/FiltersWebSite/FiltersWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/FormatterWebSite/FormatterWebSite.csproj b/test/WebSites/FormatterWebSite/FormatterWebSite.csproj
index d5348fe27d..347d0f902c 100644
--- a/test/WebSites/FormatterWebSite/FormatterWebSite.csproj
+++ b/test/WebSites/FormatterWebSite/FormatterWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/HtmlGenerationWebSite/HtmlGenerationWebSite.csproj b/test/WebSites/HtmlGenerationWebSite/HtmlGenerationWebSite.csproj
index e5f3d753a5..888f6267fc 100644
--- a/test/WebSites/HtmlGenerationWebSite/HtmlGenerationWebSite.csproj
+++ b/test/WebSites/HtmlGenerationWebSite/HtmlGenerationWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/Microsoft.AspNetCore.Mvc.TestConfiguration/Microsoft.AspNetCore.Mvc.TestConfiguration.csproj b/test/WebSites/Microsoft.AspNetCore.Mvc.TestConfiguration/Microsoft.AspNetCore.Mvc.TestConfiguration.csproj
index 6863677c48..3e0c336018 100644
--- a/test/WebSites/Microsoft.AspNetCore.Mvc.TestConfiguration/Microsoft.AspNetCore.Mvc.TestConfiguration.csproj
+++ b/test/WebSites/Microsoft.AspNetCore.Mvc.TestConfiguration/Microsoft.AspNetCore.Mvc.TestConfiguration.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/RazorPageExecutionInstrumentationWebSite/RazorPageExecutionInstrumentationWebSite.csproj b/test/WebSites/RazorPageExecutionInstrumentationWebSite/RazorPageExecutionInstrumentationWebSite.csproj
index 40c58a7e5a..d7d54054f6 100644
--- a/test/WebSites/RazorPageExecutionInstrumentationWebSite/RazorPageExecutionInstrumentationWebSite.csproj
+++ b/test/WebSites/RazorPageExecutionInstrumentationWebSite/RazorPageExecutionInstrumentationWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/RazorPagesWebSite/RazorPagesWebSite.csproj b/test/WebSites/RazorPagesWebSite/RazorPagesWebSite.csproj
index 918c5d64e8..d81a38d3ca 100644
--- a/test/WebSites/RazorPagesWebSite/RazorPagesWebSite.csproj
+++ b/test/WebSites/RazorPagesWebSite/RazorPagesWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/RazorWebSite/RazorWebSite.csproj b/test/WebSites/RazorWebSite/RazorWebSite.csproj
index 0f3c413e0f..6234f1c05f 100644
--- a/test/WebSites/RazorWebSite/RazorWebSite.csproj
+++ b/test/WebSites/RazorWebSite/RazorWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <DefineConstants>$(DefineConstants);NETCOREAPP2_0_CUSTOM_DEFINE</DefineConstants>
   </PropertyGroup>
 
diff --git a/test/WebSites/RoutingWebSite/RoutingWebSite.csproj b/test/WebSites/RoutingWebSite/RoutingWebSite.csproj
index e5f3d753a5..888f6267fc 100644
--- a/test/WebSites/RoutingWebSite/RoutingWebSite.csproj
+++ b/test/WebSites/RoutingWebSite/RoutingWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/SecurityWebSite/SecurityWebSite.csproj b/test/WebSites/SecurityWebSite/SecurityWebSite.csproj
index 4ac3aa027d..4f54fdc90e 100644
--- a/test/WebSites/SecurityWebSite/SecurityWebSite.csproj
+++ b/test/WebSites/SecurityWebSite/SecurityWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/SimpleWebSite/SimpleWebSite.csproj b/test/WebSites/SimpleWebSite/SimpleWebSite.csproj
index defa8a6a87..94a1ac4303 100644
--- a/test/WebSites/SimpleWebSite/SimpleWebSite.csproj
+++ b/test/WebSites/SimpleWebSite/SimpleWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/TagHelpersWebSite/TagHelpersWebSite.csproj b/test/WebSites/TagHelpersWebSite/TagHelpersWebSite.csproj
index 773a288c02..8af65cd909 100644
--- a/test/WebSites/TagHelpersWebSite/TagHelpersWebSite.csproj
+++ b/test/WebSites/TagHelpersWebSite/TagHelpersWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
diff --git a/test/WebSites/VersioningWebSite/VersioningWebSite.csproj b/test/WebSites/VersioningWebSite/VersioningWebSite.csproj
index e5f3d753a5..888f6267fc 100644
--- a/test/WebSites/VersioningWebSite/VersioningWebSite.csproj
+++ b/test/WebSites/VersioningWebSite/VersioningWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/WebSites/WebApiCompatShimWebSite/WebApiCompatShimWebSite.csproj b/test/WebSites/WebApiCompatShimWebSite/WebApiCompatShimWebSite.csproj
index bc8adcf63a..9f77abdfbe 100644
--- a/test/WebSites/WebApiCompatShimWebSite/WebApiCompatShimWebSite.csproj
+++ b/test/WebSites/WebApiCompatShimWebSite/WebApiCompatShimWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <PackageTargetFallback>$(PackageTargetFallback);portable-net451+win8</PackageTargetFallback>
   </PropertyGroup>
 
diff --git a/test/WebSites/XmlFormattersWebSite/XmlFormattersWebSite.csproj b/test/WebSites/XmlFormattersWebSite/XmlFormattersWebSite.csproj
index d5348fe27d..347d0f902c 100644
--- a/test/WebSites/XmlFormattersWebSite/XmlFormattersWebSite.csproj
+++ b/test/WebSites/XmlFormattersWebSite/XmlFormattersWebSite.csproj
@@ -2,7 +2,8 @@
   <Import Project="..\..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>