Runtimes.Default.props

<Project>
  <PropertyGroup>
    <RuntimeIdentifiers>win-x64;linux-x64;osx-x64;osx-arm64</RuntimeIdentifiers>
  </PropertyGroup>
  
  <!-- If a runtime identifier is not specified, 
  the default runtime identifier is decided using the current OS platform. -->
  <Choose>
    <When Condition="$([MSBuild]::IsOSPlatform('Windows'))">
      <PropertyGroup Condition="'$(RuntimeIdentifier)' == ''">
        <RuntimeIdentifier>win-x64</RuntimeIdentifier>
      </PropertyGroup>
    </When>
    <When Condition="$([MSBuild]::IsOSPlatform('Linux'))">
      <PropertyGroup Condition="'$(RuntimeIdentifier)' == ''">
        <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
      </PropertyGroup>
    </When>
    <When Condition="$([MSBuild]::IsOSPlatform('OSX'))">
      <PropertyGroup Condition="'$(RuntimeIdentifier)' == ''">
        <RuntimeIdentifier>osx-arm64</RuntimeIdentifier>
      </PropertyGroup>
    </When>
  </Choose>

  <!-- On windows we also need a platform specific target framework -->
  <PropertyGroup Condition="'$(RuntimeIdentifier)' == 'win-x64'">
    <TargetFramework>net9.0-windows10.0.17763.0</TargetFramework>
  </PropertyGroup>
</Project>