Emit now multi-targetting net461 and netcoreapp2.0

src/Compilers/CSharp/Test/Emit/Attributes/InternalsVisibleToAndStrongNameTests.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
-
+#if NET461
 using System;
 using System.Collections.Immutable;
 using System.IO;
@@ -2471,3 +2471,5 @@ public void ConsistentErrorMessageWhenProvidingEmptyKeyFile_PublicSign()
         #endregion
     }
 }
+
+#endif

src/Compilers/CSharp/Test/Emit/CSharpCompilerEmitTest.csproj

@@ -8,9 +8,9 @@
     <OutputType>Library</OutputType>
     <RootNamespace>Microsoft.CodeAnalysis.CSharp.UnitTests</RootNamespace>
     <AssemblyName>Roslyn.Compilers.CSharp.Emit.UnitTests</AssemblyName>
-    <TargetFramework>net461</TargetFramework>
-    <RuntimeIdentifier>$(RoslynDesktopRuntimeIdentifier)</RuntimeIdentifier>
-    <RoslynProjectType>UnitTest</RoslynProjectType>
+    <TargetFrameworks>$(RoslynPortableTargetFrameworks)</TargetFrameworks>
+    <RoslynProjectType>UnitTestPortable</RoslynProjectType>
+    <RuntimeIdentifiers>$(RoslynPortableRuntimeIdentifiers)</RuntimeIdentifiers>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
   <ItemGroup Label="Project References">
@@ -35,13 +35,7 @@
     </Compile>
   </ItemGroup>
   <ItemGroup>
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System" />
-    <Reference Include="System.Configuration" />
-    <Reference Include="System.Data" />
-    <Reference Include="System.Windows.Forms" />
-    <Reference Include="System.Xml" />
-    <Reference Include="System.Xml.Linq" />
+    <PackageReference Include="Microsoft.CSharp" Version="$(MicrosoftCSharpVersion)" />
     <PackageReference Include="Microsoft.DiaSymReader" Version="$(MicrosoftDiaSymReaderVersion)" />
     <PackageReference Include="xunit" Version="$(xunitVersion)" />
     <PackageReference Include="xunit.analyzers" Version="$(xunitanalyzersVersion)" />

src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenTupleTest.cs

@@ -14,7 +14,6 @@
 using Microsoft.CodeAnalysis.Text;
 using Roslyn.Test.Utilities;
 using Xunit;
-using static Roslyn.Test.Utilities.SigningTestHelpers;
 using static TestResources.NetFX.ValueTuple;
 
 namespace Microsoft.CodeAnalysis.CSharp.UnitTests.CodeGen
@@ -21329,7 +21328,7 @@ public class A
 }";
             var signedDllOptions = TestOptions.ReleaseDll.
                 WithCryptoKeyFile(SigningTestHelpers.KeyPairFile).
-                WithStrongNameProvider(s_defaultDesktopProvider);
+                WithStrongNameProvider(SigningTestHelpers.s_defaultDesktopProvider);
             var comp0v1 = CreateCompilationWithMscorlib40(source0v1, assemblyName: "A", options: signedDllOptions);
             comp0v1.VerifyDiagnostics();
             var ref0v1 = comp0v1.EmitToImageReference();

src/Compilers/CSharp/Test/Emit/CodeGen/DestructorTests.cs

@@ -11,7 +11,6 @@
 using Microsoft.CodeAnalysis.CSharp.UnitTests.Emit;
 using Microsoft.CodeAnalysis.Test.Utilities;
 using Microsoft.CodeAnalysis.Text;
-using Microsoft.CSharp.RuntimeBinder;
 using Roslyn.Test.Utilities;
 using Xunit;
 

src/Compilers/CSharp/Test/Emit/Emit/CompilationEmitTests.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+#if NET461
 
 using System;
 using System.Collections.Immutable;
@@ -5046,3 +5047,5 @@ public void CompileAndVerifyModuleIncludesAllModules()
         }
     }
 }
+
+#endif

src/Compilers/CSharp/Test/Emit/Emit/DesktopStrongNameProviderTests.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+#if NET461
 
 using System.Collections.Immutable;
 using System.IO;
@@ -70,3 +71,4 @@ class C
         }
     }
 }
+#endif

src/Compilers/CSharp/Test/Emit/PrivateProtected.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
+#if NET461
+
 using System.Collections.Immutable;
 using Microsoft.CodeAnalysis.CSharp.Test.Utilities;
 using Microsoft.CodeAnalysis.Test.Utilities;
@@ -788,3 +790,4 @@ public static void M(string s)
         }
     }
 }
+#endif