Commits on Aug 23, 2021

1. [One .NET] support latest C# 10 language features …

   Context: dotnet/sdk#19521
   Fixes: dotnet#6075
   Fixes: dotnet#6076
   
   We need to make two sets of changes for C# 10:
   
   1. Support "global usings". Our .NET 6 templates should have no
      `using` statements at the top of `.cs` files.
   2. Use `$(Nullable)` `enable` by default in project templates.
   
   To test this, our .NET 6 MSBuild tests use `Nullable=enable` and
   `ImplicitUsings=enable` by default and do not include `using`
   statements in `.cs` files.
   
   I've made a new `MainActivity.cs` for our .NET 6 MSBuild tests. The
   "legacy" Xamarin.Android tests will use the original file.
   
   Our default `global using` are:
   
       global using global::Android.App;
       global using global::Android.Widget;
       global using Bundle = global::Android.OS.Bundle;
   
   The last one is intentionally not bringing in `Android.OS`, because
   `Android.OS.Environment` would conflict with `System.Environment`.
   
   So `AutoImport.props` should become:
   
       <ItemGroup Condition=" '$(TargetPlatformIdentifier)' == 'android' and ('$(ImplicitUsings)' == 'true' or '$(ImplicitUsings)' == 'enable') ">
         <Using Include="Android.App" />
         <Using Include="Android.Widget" />
         <Using Include="Android.OS.Bundle" Alias="Bundle" />
       </ItemGroup>
   
   So these items are present at the time `.csproj` files are evaluated.
   
   Any templates will add:
   
       <Nullable>enable</Nullable>
       <ImplicitUsings>enable</ImplicitUsings>
   
   If users want to configure these settings, they can remove
   `$(ImplicitUsings)` from the `.csproj` completely or remove specific
   `@(Using)` items:
   
       <ItemGroup>
         <Using Remove="Android.App" />
       </ItemGroup>

   

   jonathanpeppers committed Aug 23, 2021
   Configuration menu

   • View commit details
   • Copy full SHA for 218a708
   • Browse repository at this point

   Copy the full SHA

   218a708 View commit details

   Browse the repository at this point in the history