[workload] setup C# implicit global usings from MSBuild

src/Controls/samples/Controls.Sample.Tests/Controls.Sample.Tests.csproj

@@ -5,6 +5,7 @@
 		<Nullable>enable</Nullable>
 		<IsPackable>false</IsPackable>
 		<UseMaui>true</UseMaui>
+		<ImplicitUsings>enable</ImplicitUsings>
 	</PropertyGroup>
 
 	<ItemGroup>

src/Controls/samples/Controls.Sample.Tests/MauiTests.cs

@@ -1,36 +1,33 @@
-using Microsoft.Maui.Controls;
-using Microsoft.Maui.Graphics;
 using Xunit;
 
-namespace Controls.Sample.Tests
+namespace Controls.Sample.Tests;
+
+public class MauiTests
 {
-	public class MauiTests
+	public MauiTests()
 	{
-		public MauiTests()
-		{
-			Device.PlatformServices = new MockPlatformServices();
-		}
+		Device.PlatformServices = new MockPlatformServices();
+	}
 
-		[Fact]
-		public void ShadowInitializesCorrectly()
-		{
-			// Arrange
-			const float expectedOpacity = 1.0f;
-			const float expectedRadius = 10.0f;
-			var expectedOffset = new Point(10, 10);
+	[Fact]
+	public void ShadowInitializesCorrectly()
+	{
+		// Arrange
+		const float expectedOpacity = 1.0f;
+		const float expectedRadius = 10.0f;
+		var expectedOffset = new Point(10, 10);
 
-			// Act
-			var shadow = new Shadow
-			{
-				Offset = expectedOffset,
-				Opacity = expectedOpacity,
-				Radius = expectedRadius
-			};
+		// Act
+		var shadow = new Shadow
+		{
+			Offset = expectedOffset,
+			Opacity = expectedOpacity,
+			Radius = expectedRadius
+		};
 
-			// Assert
-			Assert.Equal(expectedOffset, shadow.Offset);
-			Assert.Equal(expectedOpacity, shadow.Opacity);
-			Assert.Equal(expectedRadius, shadow.Radius);
-		}
+		// Assert
+		Assert.Equal(expectedOffset, shadow.Offset);
+		Assert.Equal(expectedOpacity, shadow.Opacity);
+		Assert.Equal(expectedRadius, shadow.Radius);
 	}
 }

src/Controls/samples/Controls.Sample.Tests/MockPlatformServices.cs

@@ -1,52 +1,44 @@
-using System;
-using System.IO;
-using System.Reflection;
-using System.Threading;
-using System.Threading.Tasks;
-using Microsoft.Maui;
-using Microsoft.Maui.Controls;
+using System.Reflection;
 using Microsoft.Maui.Controls.Internals;
-using Microsoft.Maui.Graphics;
 
-namespace Controls.Sample.Tests
-{
-    public class MockPlatformServices : IPlatformServices
-    {
-        public string GetHash(string input) => string.Empty;
+namespace Controls.Sample.Tests;
 
-        public string GetMD5Hash(string input) => string.Empty;
+public class MockPlatformServices : IPlatformServices
+{
+    public string GetHash(string input) => string.Empty;
 
-        public double GetNamedSize(NamedSize size, Type targetElement, bool useOldSizes) => 0;
+    public string GetMD5Hash(string input) => string.Empty;
 
-        public Color GetNamedColor(string name) => Colors.Transparent;
+    public double GetNamedSize(NamedSize size, Type targetElement, bool useOldSizes) => 0;
 
-        public void OpenUriAction(Uri uri)
-        {
-        }
+    public Color GetNamedColor(string name) => Colors.Transparent;
 
-        public bool IsInvokeRequired { get; } = false;
+    public void OpenUriAction(Uri uri)
+    {
+    }
 
-        public OSAppTheme RequestedTheme { get; } = OSAppTheme.Unspecified;
+    public bool IsInvokeRequired { get; } = false;
 
-        public string RuntimePlatform { get; set; } = string.Empty;
+    public OSAppTheme RequestedTheme { get; } = OSAppTheme.Unspecified;
 
-        public void BeginInvokeOnMainThread(Action action) => action();
+    public string RuntimePlatform { get; set; } = string.Empty;
 
-        public void StartTimer(TimeSpan interval, Func<bool> callback)
-        {
-        }
+    public void BeginInvokeOnMainThread(Action action) => action();
 
-        public Task<Stream> GetStreamAsync(Uri uri, CancellationToken cancellationToken)
-            => Task.FromResult<Stream>(new MemoryStream());
+    public void StartTimer(TimeSpan interval, Func<bool> callback)
+    {
+    }
 
-        public Assembly[] GetAssemblies() => Array.Empty<Assembly>();
+    public Task<Stream> GetStreamAsync(Uri uri, CancellationToken cancellationToken)
+        => Task.FromResult<Stream>(new MemoryStream());
 
-        public IIsolatedStorageFile? GetUserStoreForApplication() => null;
+    public Assembly[] GetAssemblies() => Array.Empty<Assembly>();
 
-        public void QuitApplication()
-        {
-        }
+    public IIsolatedStorageFile? GetUserStoreForApplication() => null;
 
-        public SizeRequest GetNativeSize(VisualElement view, double widthConstraint, double heightConstraint) => default;
+    public void QuitApplication()
+    {
     }
-}
+
+    public SizeRequest GetNativeSize(VisualElement view, double widthConstraint, double heightConstraint) => default;
+}

src/Templates/src/templates/maui-blazor/MauiApp.1.csproj

@@ -7,6 +7,7 @@
 		<RootNamespace>MauiApp._1</RootNamespace>
 		<UseMaui>true</UseMaui>
 		<SingleProject>true</SingleProject>
+		<ImplicitUsings>enable</ImplicitUsings>
 		<EnablePreviewMsixTooling>true</EnablePreviewMsixTooling>
 		<EnableDefaultCssItems>false</EnableDefaultCssItems>
 

src/Templates/src/templates/maui-lib/MauiLib1.csproj

@@ -6,6 +6,7 @@
 		<RootNamespace Condition="'$(name)' != '$(name{-VALUE-FORMS-}safe_namespace)'">MauiLib1</RootNamespace>
 		<UseMaui>true</UseMaui>
 		<SingleProject>true</SingleProject>
+		<ImplicitUsings>enable</ImplicitUsings>
 
 		<SupportedOSPlatformVersion Condition="'$(TargetFramework)' == 'net6.0-ios'">14.2</SupportedOSPlatformVersion>
 		<SupportedOSPlatformVersion Condition="'$(TargetFramework)' == 'net6.0-maccatalyst'">14.0</SupportedOSPlatformVersion>

src/Templates/src/templates/maui-mobile/MauiApp.1.csproj

@@ -7,6 +7,7 @@
 		<RootNamespace>MauiApp._1</RootNamespace>
 		<UseMaui>true</UseMaui>
 		<SingleProject>true</SingleProject>
+		<ImplicitUsings>enable</ImplicitUsings>
 		<EnablePreviewMsixTooling>true</EnablePreviewMsixTooling>
 
 		<!-- Display name -->

src/Workload/Microsoft.Maui.Sdk/Sdk/AutoImport.props

@@ -1,6 +1,18 @@
 <!-- all <ItemGroup/>'s must check if $(EnableDefaultMauiItems) is true -->
 <Project>
 
+  <ItemGroup Condition=" '$(UseMaui)' == 'true' and ('$(ImplicitUsings)' == 'true' or '$(ImplicitUsings)' == 'enable') ">
+    <!-- %(Sdk) is only here if something later needs to identify these -->
+    <Using Include="Microsoft.Extensions.DependencyInjection" Sdk="Maui" />
+    <Using Include="Microsoft.Maui" Sdk="Maui" />
+    <Using Include="Microsoft.Maui.Controls" Sdk="Maui" />
+    <Using Include="Microsoft.Maui.Controls.Hosting" Sdk="Maui" />
+    <Using Include="Microsoft.Maui.Controls.Xaml" Sdk="Maui" />
+    <Using Include="Microsoft.Maui.Graphics" Sdk="Maui" />
+    <Using Include="Microsoft.Maui.Essentials" Sdk="Maui" />
+    <Using Include="Microsoft.Maui.Hosting" Sdk="Maui" />
+  </ItemGroup>
+
   <!-- Default .NET MAUI files-->
   <ItemGroup Condition=" '$(EnableDefaultMauiItems)' == 'true' and '$(EnableDefaultEmbeddedResourceItems)' == 'true' ">
     <MauiXaml Condition=" '$(EnableDefaultXamlItems)' == 'true' "  Include="**\*.xaml" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder);$(DefaultWebContentItemExcludes)" />

src/Workload/Microsoft.Maui.Sdk/Sdk/Microsoft.Maui.Sdk.After.targets

@@ -14,5 +14,9 @@
     <ProjectCapability Include="MauiCore"       Condition=" '$(UseMaui)' == 'true' or '$(UseMauiCore)' == 'true' " />
     <ProjectCapability Include="MauiEssentials" Condition=" '$(UseMaui)' == 'true' or '$(UseMauiEssentials)' == 'true' " />
   </ItemGroup>
+  <!-- Remove platform-based @(Using) unless $(MauiEnablePlatformUsings) flag is set -->
+  <ItemGroup Condition=" '$(UseMaui)' == 'true' and '$(MauiEnablePlatformUsings)' != 'true' and ('$(ImplicitUsings)' == 'true' or '$(ImplicitUsings)' == 'enable') ">
+    <Using Remove="@(Using->HasMetadata('Platform'))" />
+  </ItemGroup>
   <Import Project="Microsoft.Maui.Controls.DefaultItems.targets" />
 </Project>