Remove net451 as a cross-compile target

.gitignore

@@ -28,3 +28,4 @@ project.lock.json
 .build/
 .testPublish/
 /.vs/
+global.json

samples/SampleApp/SampleApp.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\dependencies.props" />
   
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net451</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net46</TargetFrameworks>
     <OutputType>Exe</OutputType>
   </PropertyGroup>
 

src/Microsoft.AspNetCore.Http.Abstractions/Microsoft.AspNetCore.Http.Abstractions.csproj

@@ -10,7 +10,7 @@ Microsoft.AspNetCore.Builder.IApplicationBuilder
 Microsoft.AspNetCore.Http.HttpContext
 Microsoft.AspNetCore.Http.HttpRequest
 Microsoft.AspNetCore.Http.HttpResponse</Description>
-    <TargetFrameworks>net451;netstandard1.3</TargetFrameworks>
+    <TargetFramework>netstandard1.3</TargetFramework>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore</PackageTags>
     <NoWarn>$(NoWarn);CS1591</NoWarn>

src/Microsoft.AspNetCore.Http.Extensions/Microsoft.AspNetCore.Http.Extensions.csproj

@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core common extension methods for HTTP abstractions, HTTP headers, HTTP request/response, and session state.</Description>
-    <TargetFrameworks>net451;netstandard1.3</TargetFrameworks>
+    <TargetFramework>netstandard1.3</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore</PackageTags>

src/Microsoft.AspNetCore.Http.Features/Microsoft.AspNetCore.Http.Features.csproj

@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core HTTP feature interface definitions.</Description>
-    <TargetFrameworks>net451;netstandard1.3</TargetFrameworks>
+    <TargetFramework>netstandard1.3</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore</PackageTags>

src/Microsoft.AspNetCore.Http/FormCollection.cs

@@ -15,13 +15,8 @@ namespace Microsoft.AspNetCore.Http
     public class FormCollection : IFormCollection
     {
         public static readonly FormCollection Empty = new FormCollection();
-#if NETSTANDARD1_3
         private static readonly string[] EmptyKeys = Array.Empty<string>();
         private static readonly StringValues[] EmptyValues = Array.Empty<StringValues>();
-#else
-        private static readonly string[] EmptyKeys = new string[0];
-        private static readonly StringValues[] EmptyValues = new StringValues[0];
-#endif
         private static readonly Enumerator EmptyEnumerator = new Enumerator();
         // Pre-box
         private static readonly IEnumerator<KeyValuePair<string, StringValues>> EmptyIEnumeratorType = EmptyEnumerator;

src/Microsoft.AspNetCore.Http/HeaderDictionary.cs

@@ -14,13 +14,8 @@ namespace Microsoft.AspNetCore.Http
     /// </summary>
     public class HeaderDictionary : IHeaderDictionary
     {
-#if NETSTANDARD1_3
         private static readonly string[] EmptyKeys = Array.Empty<string>();
         private static readonly StringValues[] EmptyValues = Array.Empty<StringValues>();
-#else
-        private static readonly string[] EmptyKeys = new string[0];
-        private static readonly StringValues[] EmptyValues = new StringValues[0];
-#endif
         private static readonly Enumerator EmptyEnumerator = new Enumerator();
         // Pre-box
         private static readonly IEnumerator<KeyValuePair<string, StringValues>> EmptyIEnumeratorType = EmptyEnumerator;

src/Microsoft.AspNetCore.Http/HttpContextAccessor.cs

@@ -1,35 +1,12 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
-#if NET451
-using System;
-using System.Runtime.Remoting;
-using System.Runtime.Remoting.Messaging;
-#elif NETSTANDARD1_3
 using System.Threading;
-#endif
 
 namespace Microsoft.AspNetCore.Http
 {
     public class HttpContextAccessor : IHttpContextAccessor
     {
-#if NET451
-        private static readonly string LogicalDataKey = "__HttpContext_Current__" + AppDomain.CurrentDomain.Id;
-
-        public HttpContext HttpContext
-        {
-            get
-            {
-                var handle = CallContext.LogicalGetData(LogicalDataKey) as ObjectHandle;
-                return handle?.Unwrap() as HttpContext;
-            }
-            set
-            {
-                CallContext.LogicalSetData(LogicalDataKey, new ObjectHandle(value));
-            }
-        }
-
-#elif NETSTANDARD1_3
         private static AsyncLocal<HttpContext> _httpContextCurrent = new AsyncLocal<HttpContext>();
 
         public HttpContext HttpContext
@@ -43,6 +20,5 @@ namespace Microsoft.AspNetCore.Http
                 _httpContextCurrent.Value = value;
             }
         }
-#endif
     }
 }

src/Microsoft.AspNetCore.Http/Internal/QueryCollection.cs

@@ -14,13 +14,8 @@ namespace Microsoft.AspNetCore.Http.Internal
     public class QueryCollection : IQueryCollection
     {
         public static readonly QueryCollection Empty = new QueryCollection();
-#if NETSTANDARD1_3
         private static readonly string[] EmptyKeys = Array.Empty<string>();
         private static readonly StringValues[] EmptyValues = Array.Empty<StringValues>();
-#else
-        private static readonly string[] EmptyKeys = new string[0];
-        private static readonly StringValues[] EmptyValues = new StringValues[0];
-#endif
         private static readonly Enumerator EmptyEnumerator = new Enumerator();
         // Pre-box
         private static readonly IEnumerator<KeyValuePair<string, StringValues>> EmptyIEnumeratorType = EmptyEnumerator;

src/Microsoft.AspNetCore.Http/Internal/ReferenceReadStream.cs

@@ -115,7 +115,7 @@ namespace Microsoft.AspNetCore.Http.Internal
             _position += read;
             return read;
         }
-#if NET451
+#if NET46
         public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
         {
             ThrowIfDisposed();
@@ -164,16 +164,6 @@ namespace Microsoft.AspNetCore.Http.Internal
             var task = (Task<int>)asyncResult;
             return task.GetAwaiter().GetResult();
         }
-#endif
-        public override void Write(byte[] buffer, int offset, int count)
-        {
-            throw new NotSupportedException();
-        }
-        public override Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
-        {
-            throw new NotSupportedException();
-        }
-#if NET451
         public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
         {
             throw new NotSupportedException();
@@ -183,7 +173,19 @@ namespace Microsoft.AspNetCore.Http.Internal
         {
             throw new NotSupportedException();
         }
+#elif NETSTANDARD1_3
+#else
+#error Target frameworks need to be updated.
 #endif
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            throw new NotSupportedException();
+        }
+        public override Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
+        {
+            throw new NotSupportedException();
+        }
+
         public override void SetLength(long value)
         {
             throw new NotSupportedException();

src/Microsoft.AspNetCore.Http/Internal/RequestCookieCollection.cs

@@ -11,11 +11,7 @@ namespace Microsoft.AspNetCore.Http.Internal
     public class RequestCookieCollection : IRequestCookieCollection
     {
         public static readonly RequestCookieCollection Empty = new RequestCookieCollection();
-#if NETSTANDARD1_3
         private static readonly string[] EmptyKeys = Array.Empty<string>();
-#else
-        private static readonly string[] EmptyKeys = new string[0];
-#endif
         private static readonly Enumerator EmptyEnumerator = new Enumerator();
         // Pre-box
         private static readonly IEnumerator<KeyValuePair<string, string>> EmptyIEnumeratorType = EmptyEnumerator;

src/Microsoft.AspNetCore.Http/Microsoft.AspNetCore.Http.csproj

@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core default HTTP feature implementations.</Description>
-    <TargetFrameworks>net451;netstandard1.3</TargetFrameworks>
+    <TargetFrameworks>netstandard1.3;net46</TargetFrameworks>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>

src/Microsoft.AspNetCore.Owin/Microsoft.AspNetCore.Owin.csproj

@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core component for running OWIN middleware in an ASP.NET Core application, and to run ASP.NET Core middleware in an OWIN application.</Description>
-    <TargetFrameworks>net451;netstandard1.3</TargetFrameworks>
+    <TargetFramework>netstandard1.3</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;owin</PackageTags>

src/Microsoft.AspNetCore.WebUtilities/BufferedReadStream.cs

@@ -162,17 +162,7 @@ namespace Microsoft.AspNetCore.WebUtilities
         {
             _inner.Write(buffer, offset, count);
         }
-#if NET451
-        public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
-        {
-            return _inner.BeginWrite(buffer, offset, count, callback, state);
-        }
 
-        public override void EndWrite(IAsyncResult asyncResult)
-        {
-            _inner.EndWrite(asyncResult);
-        }
-#endif
         public override Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
         {
             return _inner.WriteAsync(buffer, offset, count, cancellationToken);
@@ -211,7 +201,17 @@ namespace Microsoft.AspNetCore.WebUtilities
 
             return await _inner.ReadAsync(buffer, offset, count, cancellationToken);
         }
-#if NET451
+#if NET46
+        public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
+        {
+            return _inner.BeginWrite(buffer, offset, count, callback, state);
+        }
+
+        public override void EndWrite(IAsyncResult asyncResult)
+        {
+            _inner.EndWrite(asyncResult);
+        }
+
         // We only anticipate using ReadAsync
         public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
         {
@@ -262,6 +262,9 @@ namespace Microsoft.AspNetCore.WebUtilities
             }
             return _inner.EndRead(asyncResult);
         }
+#elif NETSTANDARD1_3
+#else
+#error Target frameworks need to be updated.
 #endif
         public bool EnsureBuffered()
         {

src/Microsoft.AspNetCore.WebUtilities/FileBufferingReadStream.cs

@@ -250,7 +250,7 @@ namespace Microsoft.AspNetCore.WebUtilities
 
             return read;
         }
-#if NET451
+#if NET46
         public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
         {
             ThrowIfDisposed();
@@ -298,6 +298,19 @@ namespace Microsoft.AspNetCore.WebUtilities
             var task = (Task<int>)asyncResult;
             return task.GetAwaiter().GetResult();
         }
+
+        public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
+        {
+            throw new NotSupportedException();
+        }
+
+        public override void EndWrite(IAsyncResult asyncResult)
+        {
+            throw new NotSupportedException();
+        }
+#elif NETSTANDARD1_3
+#else
+#error Target frameworks need to be updated.
 #endif
         public override async Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
         {
@@ -358,17 +371,7 @@ namespace Microsoft.AspNetCore.WebUtilities
         {
             throw new NotSupportedException();
         }
-#if NET451
-        public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
-        {
-            throw new NotSupportedException();
-        }
 
-        public override void EndWrite(IAsyncResult asyncResult)
-        {
-            throw new NotSupportedException();
-        }
-#endif
         public override Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
         {
             throw new NotSupportedException();

src/Microsoft.AspNetCore.WebUtilities/HttpRequestStreamReader.cs

@@ -108,11 +108,14 @@ namespace Microsoft.AspNetCore.WebUtilities
             }
         }
 
-#if NET451 
+#if NET46 
         public override void Close()
         {
             Dispose(true);
         }
+#elif NETSTANDARD1_3
+#else
+#error Target frameworks need to be updated.
 #endif
 
         protected override void Dispose(bool disposing)

src/Microsoft.AspNetCore.WebUtilities/Microsoft.AspNetCore.WebUtilities.csproj

@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>ASP.NET Core utilities, such as for working with forms, multipart messages, and query strings.</Description>
-    <TargetFrameworks>net451;netstandard1.3</TargetFrameworks>
+    <TargetFrameworks>netstandard1.3;net46</TargetFrameworks>
     <DefineConstants>$(DefineConstants);WebEncoders_In_WebUtilities</DefineConstants>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>

src/Microsoft.AspNetCore.WebUtilities/MultipartReaderStream.cs

@@ -126,17 +126,7 @@ namespace Microsoft.AspNetCore.WebUtilities
         {
             throw new NotSupportedException();
         }
-#if NET451
-        public override IAsyncResult BeginWrite(byte[] buffer, int offset, int size, AsyncCallback callback, object state)
-        {
-            throw new NotSupportedException();
-        }
 
-        public override void EndWrite(IAsyncResult asyncResult)
-        {
-            throw new NotSupportedException();
-        }
-#endif
         public override Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
         {
             throw new NotSupportedException();
@@ -168,7 +158,17 @@ namespace Microsoft.AspNetCore.WebUtilities
             }
             return read;
         }
-#if NET451
+#if NET46
+        public override IAsyncResult BeginWrite(byte[] buffer, int offset, int size, AsyncCallback callback, object state)
+        {
+            throw new NotSupportedException();
+        }
+
+        public override void EndWrite(IAsyncResult asyncResult)
+        {
+            throw new NotSupportedException();
+        }
+
         public override IAsyncResult BeginRead(byte[] buffer, int offset, int size, AsyncCallback callback, object state)
         {
             var tcs = new TaskCompletionSource<int>(state);
@@ -215,6 +215,9 @@ namespace Microsoft.AspNetCore.WebUtilities
             var task = (Task<int>)asyncResult;
             return task.GetAwaiter().GetResult();
         }
+#elif NETSTANDARD1_3
+#else
+#error Target frameworks need to be updated.
 #endif
         public override int Read(byte[] buffer, int offset, int count)
         {
@@ -231,10 +234,8 @@ namespace Microsoft.AspNetCore.WebUtilities
             var bufferedData = _innerStream.BufferedData;
 
             // scan for a boundary match, full or partial.
-            int matchOffset;
-            int matchCount;
             int read;
-            if (SubMatch(bufferedData, _boundary.BoundaryBytes, out matchOffset, out matchCount))
+            if (SubMatch(bufferedData, _boundary.BoundaryBytes, out var matchOffset, out var matchCount))
             {
                 // We found a possible match, return any data before it.
                 if (matchOffset > bufferedData.Offset)

src/Microsoft.Net.Http.Headers/Microsoft.Net.Http.Headers.csproj

@@ -4,7 +4,7 @@
 
   <PropertyGroup>
     <Description>HTTP header parser implementations.</Description>
-    <TargetFrameworks>net451;netstandard1.1</TargetFrameworks>
+    <TargetFramework>netstandard1.1</TargetFramework>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>

test/Microsoft.AspNetCore.Http.Abstractions.Tests/Microsoft.AspNetCore.Http.Abstractions.Tests.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net452</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net46</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 

test/Microsoft.AspNetCore.Http.Extensions.Tests/Microsoft.AspNetCore.Http.Extensions.Tests.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net452</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net46</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 

test/Microsoft.AspNetCore.Http.Features.Tests/Microsoft.AspNetCore.Http.Features.Tests.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net452</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net46</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 

test/Microsoft.AspNetCore.Http.Tests/HttpContextFactoryTests.cs

@@ -2,6 +2,7 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
+using System.IO;
 using Microsoft.AspNetCore.Http.Features;
 using Microsoft.Extensions.ObjectPool;
 using Microsoft.Extensions.Options;
@@ -36,7 +37,7 @@ namespace Microsoft.AspNetCore.Http
             contextFactory.Dispose(context);
         }
 
-#if NET452
+#if NET46
         private static void DomainFunc()
         {
             var accessor = new HttpContextAccessor();
@@ -50,9 +51,11 @@ namespace Microsoft.AspNetCore.Http
             // Arrange
             var accessor = new HttpContextAccessor();
             var contextFactory = new HttpContextFactory(new DefaultObjectPoolProvider(), Options.Create(new FormOptions()), accessor);
+            var baseDirectory = AppDomain.CurrentDomain.BaseDirectory;
             var setupInfo = new AppDomainSetup
             {
-               ApplicationBase = AppDomain.CurrentDomain.BaseDirectory
+                ApplicationBase = baseDirectory,
+                ConfigurationFile = Path.Combine(baseDirectory, Path.GetFileNameWithoutExtension(GetType().Assembly.Location) + ".dll.config"),
             };
             var domain = AppDomain.CreateDomain("newDomain", null, setupInfo);
 

test/Microsoft.AspNetCore.Http.Tests/Microsoft.AspNetCore.Http.Tests.csproj

@@ -3,8 +3,10 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net452</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net46</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
   </PropertyGroup>
 
   <ItemGroup>

test/Microsoft.AspNetCore.Owin.Tests/Microsoft.AspNetCore.Owin.Tests.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net452</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net46</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 

test/Microsoft.AspNetCore.WebUtilities.Tests/FileBufferingReadStreamTests.cs

@@ -293,7 +293,7 @@ namespace Microsoft.AspNetCore.WebUtilities
 
         private static string GetCurrentDirectory()
         {
-#if NET452
+#if NET46
             return AppDomain.CurrentDomain.BaseDirectory;
 #elif NETCOREAPP2_0
             return AppContext.BaseDirectory;

test/Microsoft.AspNetCore.WebUtilities.Tests/HttpResponseStreamWriterTest.cs

@@ -34,7 +34,7 @@ namespace Microsoft.AspNetCore.WebUtilities.Test
             Assert.Equal(expectedData, memoryStream.ToArray());
         }
 
-#if NET452
+#if NET46
         [Fact]
         public async Task DoesNotFlush_UnderlyingStream_OnClosingWriter()
         {
@@ -71,7 +71,7 @@ namespace Microsoft.AspNetCore.WebUtilities.Test
             Assert.Equal(0, stream.FlushAsyncCallCount);
         }
 
-#if NET452
+#if NET46
         [Fact]
         public async Task DoesNotClose_UnderlyingStream_OnDisposingWriter()
         {
@@ -119,7 +119,7 @@ namespace Microsoft.AspNetCore.WebUtilities.Test
             await writer.WriteAsync(new string('a', byteLength));
 
             // Act
-#if NET452
+#if NET46
             writer.Close();
 #elif NETCOREAPP2_0
             writer.Dispose();
@@ -345,7 +345,7 @@ namespace Microsoft.AspNetCore.WebUtilities.Test
 
         [Theory]
         [InlineData("你好世界", "utf-16")]
-#if NET452
+#if NET46
         // CoreCLR does not like shift_jis as an encoding.
         [InlineData("こんにちは世界", "shift_jis")]
 #elif NETCOREAPP2_0
@@ -379,7 +379,7 @@ namespace Microsoft.AspNetCore.WebUtilities.Test
         [InlineData('你', 1023, "utf-16")]
         [InlineData('你', 1024, "utf-16")]
         [InlineData('你', 1050, "utf-16")]
-#if NET452
+#if NET46
         // CoreCLR does not like shift_jis as an encoding.
         [InlineData('こ', 1023, "shift_jis")]
         [InlineData('こ', 1024, "shift_jis")]
@@ -516,7 +516,7 @@ namespace Microsoft.AspNetCore.WebUtilities.Test
                 return base.WriteAsync(buffer, offset, count, cancellationToken);
             }
 
-#if NET452
+#if NET46
             public override void Close()
             {
                 CloseCallCount++;

test/Microsoft.AspNetCore.WebUtilities.Tests/Microsoft.AspNetCore.WebUtilities.Tests.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net452</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net46</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>
 

test/Microsoft.Net.Http.Headers.Tests/Microsoft.Net.Http.Headers.Tests.csproj

@@ -3,7 +3,7 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net452</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.0;net46</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
   </PropertyGroup>