<PackageReference Include="System.Configuration.ConfigurationManager" Version="11.0.0-rc.1.26425.128" />

System.Runtime.Versioning.SupportedOSPlatformGuardAttribute

namespace System.Configuration.Provider { } namespace System.Runtime.Versioning { } namespace System.Runtime.Versioning { internal sealed class SupportedOSPlatformGuardAttribute : System.Runtime.Versioning.OSPlatformAttribute { public SupportedOSPlatformGuardAttribute(string platformName); } }