There appear to be some build issues on recent sdks

[jacdavis]

D:\dd\try-convert.dotnet\sdk\5.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.DefaultItems.targets(257,5): error NETSDK1023: A PackageReference for 'Microsoft.NET.Test.Sdk' was included in your project. This package is implicitly referenced by the .NET SDK and you do not typically need to reference it from your project. For more information, see https://aka.ms/sdkimplicitrefs [D:\dd\try-convert\tests\end-to-end\MauiSmoke.Tests\MauiSmoke.Tests.csproj]
D:\dd\try-convert.dotnet\sdk\5.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.DefaultItems.targets(257,5): error NETSDK1023: A PackageReference for 'xunit' was included in your project. This package is implicitly referenced by the .NET SDK and you do not typically need to reference it from your project. For more information, see https://aka.ms/sdkimplicitrefs [D:\dd\try-convert\tests\end-to-end\MauiSmoke.Tests\MauiSmoke.Tests.csproj]
D:\dd\try-convert.dotnet\sdk\5.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.DefaultItems.targets(257,5): error NETSDK1023: A PackageReference for 'xunit.runner.visualstudio' was included in your project. This package is implicitly referenced by the .NET SDK and you do not typically need to reference it from your project. For more information, see https://aka.ms/sdkimplicitrefs [D:\dd\try-convert\tests\end-to-end\MauiSmoke.Tests\MauiSmoke.Tests.csproj]
D:\dd\try-convert.dotnet\sdk\5.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.DefaultItems.targets(257,5): error NETSDK1023: A PackageReference for 'Microsoft.NET.Test.Sdk' was included in your project. This package is implicitly referenced by the .NET SDK and you do not typically need to reference it from your project. For more information, see https://aka.ms/sdkimplicitrefs [D:\dd\try-convert\tests\end-to-end\MauiSmoke.Tests\MauiSmoke.Tests.csproj]
D:\dd\try-convert.dotnet\sdk\5.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.DefaultItems.targets(257,5): error NETSDK1023: A PackageReference for 'xunit' was included in your project. This package is implicitly referenced by the .NET SDK and you do not typically need to reference it from your project. For more information, see https://aka.ms/sdkimplicitrefs [D:\dd\try-convert\tests\end-to-end\MauiSmoke.Tests\MauiSmoke.Tests.csproj]
D:\dd\try-convert.dotnet\sdk\5.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.DefaultItems.targets(257,5): error NETSDK1023: A PackageReference for 'xunit.runner.visualstudio' was included in your project. This package is implicitly referenced by the .NET SDK and you do not typically need to reference it from your project. For more information, see https://aka.ms/sdkimplicitrefs [D:\dd\try-convert\tests\end-to-end\MauiSmoke.Tests\MauiSmoke.Tests.csproj]
D:\dd\try-convert\src\try-convert\Program.cs(83,41): error CS8600: Converting null literal or possible null value to non-nullable type. [D:\dd\try-convert\src\try-convert\try-convert.csproj]