Add global usings for .NET projects (.NET SDK, Web and Worker)

src/Assets/TestProjects/BlazorHostedRID/blazorhosted/blazorhosted-rid.csproj

@@ -3,6 +3,8 @@
   <PropertyGroup>
     <TargetFramework>$(AspNetTestTfm)</TargetFramework>
     <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
+    <!-- Removing implicit namespace imports for web since AspNetCore.App is removed -->
+    <DisableImplicitNamespaceImports_Web>true</DisableImplicitNamespaceImports_Web>
   </PropertyGroup>
 
   <ItemGroup>

src/Layout/toolset-tasks/toolset-tasks.csproj

@@ -3,6 +3,7 @@
     <TargetFrameworks>$(SdkTargetFramework);net472</TargetFrameworks>
     <TargetFrameworks Condition=" '$([MSBuild]::IsOSPlatform(`Windows`))' == 'false' ">$(SdkTargetFramework)</TargetFrameworks>
     <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
+    <DisableImplicitNamespaceImports>true</DisableImplicitNamespaceImports>
   </PropertyGroup>
 
   <ItemGroup>

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.GenerateImplicitNamespaceImports.targets

@@ -0,0 +1,57 @@
+<!--
+***********************************************************************************************
+Microsoft.NET.GenerateImplicitNamespaceImports.targets
+
+WARNING:  DO NOT MODIFY this file unless you are knowledgeable about MSBuild and have
+          created a backup copy.  Incorrect changes to this file will make it
+          impossible to load or build your projects from the command-line or the IDE.
+
+Copyright (c) .NET Foundation. All rights reserved.
+***********************************************************************************************
+-->
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <!--
+    ============================================================
+                                     GenerateImplicitNamespaceImports
+
+    Generates implicit namespace imports source to intermediate directory for C# projects
+    ============================================================
+    -->
+  <PropertyGroup>
+    <GeneratedImplicitNamespaceImportFile Condition="'$(GeneratedImplicitNamespaceImportFile)' ==''">$(IntermediateOutputPath)$(MSBuildProjectName).ImplicitNamespaceImports$(DefaultLanguageSourceExtension)</GeneratedImplicitNamespaceImportFile>
+    <DisableImplicitNamespaceImports_DotNet Condition="'$(DisableImplicitNamespaceImports_DotNet)' == '' and '$(DisableImplicitNamespaceImports)' != 'true'">false</DisableImplicitNamespaceImports_DotNet>
+  </PropertyGroup>
+
+  <!--
+    Note that this must run before every invocation of CoreCompile to ensure that all compiler
+    runs see the generated assembly info. There is at least one scenario involving Xaml
+    where CoreCompile is invoked without other potential hooks such as Compile or CoreBuild,
+    etc., so we hook directly on to CoreCompile. Furthermore, we  must run *after*
+    PrepareForBuild to ensure that the intermediate directory has been created.
+
+    Targets that generate Compile items are also expected to run before
+    BeforeCompile targets (common targets convention).
+   -->
+  <Target Name="GenerateImplicitNamespaceImports"
+          BeforeTargets="BeforeCompile;CoreCompile"
+          DependsOnTargets="PrepareForBuild;CoreGenerateImplicitNamespaceImports"
+          Condition="'$(DisableImplicitNamespaceImports)' != 'true'" />
+
+  <Target Name="CoreGenerateImplicitNamespaceImports"
+          Outputs="$(GeneratedImplicitNamespaceImportFile)"
+          Condition="'@(Import)' != ''">
+    <ItemGroup>
+      <_UniqueImport Include="@(Import->Distinct())" />
+      <_ImportFileLine Include="// %3Cautogenerated />"/>
+      <_ImportFileLine Include="global using global::%(_UniqueImport.Identity)%3B"/>
+    </ItemGroup>
+
+    <WriteLinesToFile Lines="@(_ImportFileLine)" File="$(GeneratedImplicitNamespaceImportFile)" Overwrite="true" WriteOnlyWhenDifferent="true" />
+
+    <ItemGroup>
+      <Compile Include="$(GeneratedImplicitNamespaceImportFile)" />
+      <FileWrites Include="$(GeneratedImplicitNamespaceImportFile)" />
+    </ItemGroup>
+  </Target>
+
+</Project>

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.DefaultItems.props

@@ -82,4 +82,16 @@ Copyright (c) .NET Foundation. All rights reserved.
 
   </ItemGroup>
 
+  <ItemGroup Condition=" '$(DisableImplicitNamespaceImports_DotNet)' != 'true'
+                      and '$(TargetFrameworkIdentifier)' == '.NETCoreApp'
+                      and $([MSBuild]::VersionGreaterThanOrEquals($(_TargetFrameworkVersionWithoutV), '6.0'))">
+    <Import Include="System" />
+    <Import Include="System.Collections.Generic" />
+    <Import Include="System.IO" />
+    <Import Include="System.Linq" />
+    <Import Include="System.Net.Http" />
+    <Import Include="System.Threading" />
+    <Import Include="System.Threading.Tasks" />
+  </ItemGroup>
+
 </Project>

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.VisualBasic.targets

@@ -10,9 +10,6 @@ Copyright (c) .NET Foundation. All rights reserved.
 ***********************************************************************************************
 -->
 <Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
-    <DisableImplicitNamespaceImports Condition="'$(DisableImplicitNamespaceImports)'==''">$(DisableImplicitFrameworkReferences)</DisableImplicitNamespaceImports>
-  </PropertyGroup>
   <ItemGroup Condition=" '$(DisableImplicitNamespaceImports)' != 'true' and '$(TargetFrameworkIdentifier)' == '.NETFramework'">
     <!-- These namespaces are present in 2.0 Framework assemblies -->
     <Import Include="Microsoft.VisualBasic" />

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.targets

@@ -39,6 +39,7 @@ Copyright (c) .NET Foundation. All rights reserved.
     <ComputeNETCoreBuildOutputFiles Condition=" '$(ComputeNETCoreBuildOutputFiles)' == '' and '$(TargetFrameworkIdentifier)' == '.NETCoreApp'">true</ComputeNETCoreBuildOutputFiles>
     <_GenerateRuntimeConfigurationPropertyInputsCache Condition="'$(_GenerateRuntimeConfigurationPropertyInputsCache)' == ''">$(IntermediateOutputPath)$(MSBuildProjectName).genruntimeconfig.cache</_GenerateRuntimeConfigurationPropertyInputsCache>
     <_GenerateRuntimeConfigurationPropertyInputsCache>$([MSBuild]::NormalizePath($(MSBuildProjectDirectory), $(_GenerateRuntimeConfigurationPropertyInputsCache)))</_GenerateRuntimeConfigurationPropertyInputsCache>
+    <DisableImplicitNamespaceImports Condition="'$(DisableImplicitNamespaceImports)'==''">$(DisableImplicitFrameworkReferences)</DisableImplicitNamespaceImports>
   </PropertyGroup>
 
   <ItemGroup>
@@ -1087,6 +1088,7 @@ Copyright (c) .NET Foundation. All rights reserved.
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.DisableStandardFrameworkResolution.targets" Condition="'$(DisableStandardFrameworkResolution)' == 'true'" />
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.DesignerSupport.targets" />
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.GenerateAssemblyInfo.targets" Condition="'$(UsingNETSdkDefaults)' == 'true'"/>
+  <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.GenerateImplicitNamespaceImports.targets" Condition="'$(DisableImplicitNamespaceImports)' != 'true' and '$(Language)' == 'C#'"/>
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.GenerateSupportedRuntime.targets" />
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.ComposeStore.targets" Condition="'$(UsingNETSdkDefaults)' == 'true'" />
   <Import Project="$(MSBuildThisFileDirectory)Microsoft.NET.CrossGen.targets" />

src/Tests/EndToEnd.Tests/GivenDotNetUsesMSBuild.cs

@@ -21,7 +21,7 @@ public GivenDotNetUsesMSBuild(ITestOutputHelper log) : base(log)
         {
         }
 
-        [RequiresMSBuildVersionFact("16.8.0")]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void ItCanNewRestoreBuildRunCleanMSBuildProject()
         {
             string projectDirectory = _testAssetsManager.CreateTestDirectory().Path;

src/Tests/Microsoft.DotNet.ApiCompatibility.Tests/Rules/AssemblyIdentityMustMatchTests.cs

@@ -34,7 +34,7 @@ public static void AssemblyNamesDoNotMatch()
             Assert.Equal(expected, differences.First(), CompatDifferenceComparer.Default);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void AssemblyCultureMustBeCompatible()
         {
             // setting different assembly culture for net6.0
@@ -54,7 +54,7 @@ public void AssemblyCultureMustBeCompatible()
             TestAsset testAsset = _testAssetsManager.CreateTestProject(testProject);
             BuildCommand buildCommand = new(testAsset);
             buildCommand.Execute().Should().Pass();
-            
+
             string leftDllPath = Path.Combine(buildCommand.GetOutputDirectory("netstandard2.0").FullName, "Project.dll");
             string rightDllPath = Path.Combine(buildCommand.GetOutputDirectory("net6.0").FullName, "Project.dll");
             IAssemblySymbol leftSymbols = new AssemblySymbolLoader().LoadAssembly(leftDllPath);
@@ -68,7 +68,7 @@ public void AssemblyCultureMustBeCompatible()
             Assert.Equal(expected, differences.First(), CompatDifferenceComparer.Default);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void AssemblyVersionMustBeCompatible()
         {
             // setting different assembly culture for netstanard2.0
@@ -102,7 +102,7 @@ public void AssemblyVersionMustBeCompatible()
             Assert.Equal(expected, differences.First(), CompatDifferenceComparer.Default);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void AssemblyVersionMustBeStrictlyCompatible()
         {
             // setting different assembly culture for netstanard2.0
@@ -144,7 +144,7 @@ public void AssemblyVersionMustBeStrictlyCompatible()
             Assert.Equal(expected, differences.First(), CompatDifferenceComparer.Default);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void AssemblyKeyTokenMustBeCompatible()
         {
             var testAsset = _testAssetsManager
@@ -165,7 +165,7 @@ public void AssemblyKeyTokenMustBeCompatible()
             Assert.Empty(differences);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void LeftAssemblyKeyTokenNull()
         {
             var testAsset = _testAssetsManager
@@ -185,7 +185,7 @@ public void LeftAssemblyKeyTokenNull()
             Assert.Empty(differences);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void RightAssemblyKeyTokenNull()
         {
             var testAsset = _testAssetsManager
@@ -208,7 +208,7 @@ public void RightAssemblyKeyTokenNull()
             Assert.Equal(expected, differences.First(), CompatDifferenceComparer.Default);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void RetargetableFlagSet()
         {
             var testAsset = _testAssetsManager
@@ -230,7 +230,7 @@ public void RetargetableFlagSet()
             Assert.Empty(differences);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void LeftAssemblyKeyTokenNullStrictMode()
         {
             var testAsset = _testAssetsManager

src/Tests/Microsoft.DotNet.PackageValidation.Tests/ValidatePackageTargetTests.cs

@@ -15,7 +15,7 @@ public ValidatePackageTargetTests(ITestOutputHelper log) : base(log)
         {
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void InvalidPackage()
         {
             var testAsset = _testAssetsManager
@@ -30,7 +30,7 @@ public void InvalidPackage()
             Assert.Contains("error CP0002: Member 'PackageValidationTestProject.Program.SomeAPINotIn6_0()' exists on lib/netstandard2.0/PackageValidationTestProject.dll but not on lib/net6.0/PackageValidationTestProject.dll", result.StdOut);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void ValidatePackageTargetRunsSuccessfully()
         {
             var testAsset = _testAssetsManager
@@ -44,7 +44,7 @@ public void ValidatePackageTargetRunsSuccessfully()
             Assert.Equal(0, result.ExitCode);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void ValidatePackageTargetRunsSuccessfullyWithBaselineCheck()
         {
             var testAsset = _testAssetsManager
@@ -64,7 +64,7 @@ public void ValidatePackageTargetRunsSuccessfullyWithBaselineCheck()
             Assert.Equal(0, result.ExitCode);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void ValidatePackageTargetRunsSuccessfullyWithBaselineVersion()
         {
             var testAsset = _testAssetsManager
@@ -83,7 +83,7 @@ public void ValidatePackageTargetRunsSuccessfullyWithBaselineVersion()
             Assert.Equal(0, result.ExitCode);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void ValidatePackageTargetFailsWithBaselineVersion()
         {
             var testAsset = _testAssetsManager
@@ -104,7 +104,7 @@ public void ValidatePackageTargetFailsWithBaselineVersion()
             Assert.Contains("error CP0002: Member 'PackageValidationTestProject.Program.SomeApiNotInLatestVersion()' exists on [Baseline] lib/netstandard2.0/PackageValidationTestProject.dll but not on lib/netstandard2.0/PackageValidationTestProject.dll", result.StdOut);
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void ValidatePackageTargetWithIncorrectBaselinePackagePath()
         {
             var testAsset = _testAssetsManager

src/Tests/Microsoft.NET.Build.Tests/GivenFrameworkReferences.cs

@@ -34,7 +34,7 @@ public static void Main(string [] args)
     }
 }";
 
-        [WindowsOnlyTheory]
+        [WindowsOnlyRequiresMSBuildVersionTheory("17.0.0.32901")]
         [InlineData("net6.0", true)]
         [InlineData("netcoreapp3.1", false)]
         public void Multiple_frameworks_are_written_to_runtimeconfig_when_there_are_multiple_FrameworkReferences(string targetFramework, bool shouldIncludeBaseFramework)
@@ -149,7 +149,7 @@ public void ForceGenerateRuntimeConfigurationFiles_works_even_on_netFramework_tf
             Assert.True(File.Exists(runtimeConfigFile), $"Expected to generate runtime config file '{runtimeConfigFile}'");
         }
 
-        [WindowsOnlyFact]
+        [WindowsOnlyRequiresMSBuildVersionFact("17.0.0.32901")]
         public void DuplicateFrameworksAreNotWrittenToRuntimeConfigWhenThereAreDifferentProfiles()
         {
             var testProject = new TestProject()
@@ -494,7 +494,7 @@ public void BuildFailsIfRuntimePackHasNotBeenRestored()
                 TargetFrameworks = "netcoreapp3.0",
                 IsExe = true,
             };
-            
+
             //  Use a test-specific packages folder
             testProject.AdditionalProperties["RestorePackagesPath"] = @"$(MSBuildProjectDirectory)\packages";
 
@@ -676,7 +676,7 @@ public void TargetingPackVersionCanBeSpecifiedOnFrameworkReference()
         //  Transitive framework references require NuGet support, which isn't currently
         //  in the full Framework MSBuild we use in CI, so only run these tests for
         //  core MSBuild for now
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void TransitiveFrameworkReferenceFromProjectReference()
         {
             var testProject = new TestProject()

src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildALibrary.cs

@@ -841,7 +841,7 @@ public void It_marks_package_references_as_externally_resolved(bool? markAsExter
             }
         }
 
-        [Theory]
+        [RequiresMSBuildVersionTheory("17.0.0.32901")]
         [InlineData("net5.0", false, false, false, null)]   // Pre .NET 6.0 predefinedCulturesOnly is not supported.
         [InlineData("net5.0", true, false, false, null)]    // Pre .NET 6.0 predefinedCulturesOnly is not supported.
         [InlineData("net5.0", false, true, true, "True")]   // Pre .NET 6.0 predefinedCulturesOnly can end up in the runtime config file but with no effect at runtime.

src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildALibraryWithOSSupportedVersion.cs

@@ -167,7 +167,7 @@ public void WhenTargetPlatformMinVersionIsSetForWindowsItIsUsedForTheSupportedOS
                 .And.HaveStdOutContaining(SupportedOSPlatformAttribute("Windows10.0.18362.0"));
         }
 
-        [WindowsOnlyFact]
+        [WindowsOnlyRequiresMSBuildVersionFact("17.0.0.32901")]
         public void WhenTargetingWindowsSupportedOSVersionPropertySetsTargetPlatformMinVersion()
         {
             TestProject testProject = SetUpProject("net6.0-windows10.0.19041");
@@ -190,7 +190,7 @@ public void WhenTargetingWindowsSupportedOSVersionPropertySetsTargetPlatformMinV
 
             getValuesCommand.GetValues()
                 .Should()
-                .BeEquivalentTo("10.0.18362.0");                
+                .BeEquivalentTo("10.0.18362.0");
         }
 
         [WindowsOnlyFact]
@@ -266,7 +266,7 @@ private static string TargetPlatformAttribute(string targetPlatform)
 
             return expected;
         }
-  
+
         private static string SupportedOSPlatformAttribute(string supportedOSPlatform)
         {
             string expected = string.IsNullOrEmpty(supportedOSPlatform) ?

src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildANetCoreApp.cs

@@ -405,7 +405,7 @@ public void It_stops_generating_runtimeconfig_dev_json_after_net6(string targetF
             File.Exists(runtimeconfigFile).Should().Be(shouldGenerateRuntimeConfigDevJson);
         }
 
-        [Theory]
+        [RequiresMSBuildVersionTheory("17.0.0.32901")]
         [InlineData("netcoreapp2.0")]
         [InlineData("netcoreapp3.0")]
         [InlineData("net5.0")]

src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildAWindowsDesktopProject.cs

@@ -149,7 +149,7 @@ public void It_imports_when_targeting_dotnet_3()
             getValuesCommand.GetValues().ShouldBeEquivalentTo(new[] { "true" });
         }
 
-        [WindowsOnlyFact]
+        [WindowsOnlyRequiresMSBuildVersionFact("17.0.0.32901", Skip = "https://github.com/dotnet/sdk/issues/18800")]
         public void It_builds_successfully_when_targeting_net_framework()
         {
             var testDirectory = _testAssetsManager.CreateTestDirectory().Path;
@@ -241,7 +241,7 @@ public void It_fails_if_target_platform_identifier_and_version_are_invalid()
                 .NotHaveStdOutContaining("NETSDK1140");
         }
 
-        [WindowsOnlyFact]
+        [WindowsOnlyRequiresMSBuildVersionFact("17.0.0.32901")]
         public void UseWPFCanBeSetInDirectoryBuildTargets()
         {
             var testDir = _testAssetsManager.CreateTestDirectory();
@@ -367,7 +367,7 @@ public void WindowsWorkloadIsInstalledForNet5AndUp(string targetFramework, bool
                 getValueCommand.GetValues()
                     .Should()
                     .Contain("windows");
-            } 
+            }
             else
             {
                 getValueCommand.GetValues()

src/Tests/Microsoft.NET.Build.Tests/GivenThatWeWantToControlGeneratedAssemblyInfo.cs

@@ -370,7 +370,7 @@ public void It_includes_internals_visible_to()
             AssemblyInfo.Get(assemblyPath)["InternalsVisibleToAttribute"].Should().Be("Tests");
         }
 
-        [Theory]
+        [RequiresMSBuildVersionTheory("17.0.0.32901")]
         [InlineData(true, true)]
         [InlineData(true, false)]
         [InlineData(false, false)]
@@ -429,7 +429,7 @@ public void TestPreviewFeatures(bool enablePreviewFeatures, bool generateRequire
             }
         }
 
-        [Fact]
+        [RequiresMSBuildVersionFact("17.0.0.32901")]
         public void It_doesnt_includes_requires_preview_features()
         {
             var testAsset = _testAssetsManager