Should .NET Standard be implicitly referenced?
chucker opened this issue · comments
I have a C# wrapper around a native macOS library for Xamarin, and want it to work with .NET 6 as well. It also has a package reference to a .NET Standard library.
However, if I try to consume any enum from that package, I get:
MyClass.cs(12,12): Error CS0012: The type 'Enum' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.
For example, with a csproj like:
<Project Sdk="Xamarin.Legacy.Sdk/0.1.2-alpha6">
<PropertyGroup>
<TargetFrameworks>xamarinmac2.0;net6.0-macos</TargetFrameworks>
<Nullable>enable</Nullable>
<NoNFloatUsing>true</NoNFloatUsing> <!-- https://github.com/xamarin/xamarin-macios/issues/14434 -->
</PropertyGroup>
<ItemGroup>
<PackageReference Include="System.Text.Json" Version="6.0.3" />
</ItemGroup>
</Project>And a MyClass.cs like:
public class MyClass
{
public MyClass()
{
var x = System.IO.FileAccess.Read; // an enum from .NET Standard
var y = System.Text.Json.JsonTokenType.Comment; // an enum from a package
}
}This won't build. Oddly enough, the first line will build, and the second will not.
If I explicitly supply a hint path, it seems to work:
<ItemGroup Condition="'$(TargetFramework)' == 'xamarinmac2.0'">
<Reference Include="netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51">
<HintPath>/Library/Frameworks/Xamarin.Mac.framework/Versions/8.8.0.0/lib/mono/4.5/Facades/netstandard.dll</HintPath>
</Reference>
</ItemGroup>Is this intentional, or should the SDK pull in .NET Standard automatically?
The Mac support here was a community contribution, but it sounds like the Facades directory isn't setup appropriately for Xamarin.Mac.
I would probably compare a .binlog from a Xamarin.Mac class library and see if some MSBuild property has a different path we are missing. Probably something needed in this file: