xamarinios 
namespace System.IdentityModel.Selectors
{
    public abstract class SecurityTokenProvider
    {
        protected virtual IAsyncResult BeginGetTokenCore(TimeSpan timeout, AsyncCallback callback, object state);
    }
}
.NET
5.06.07.08.09.010.0
.NET Core
2.02.12.23.03.1
.NET Framework
3.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
.NET Standard
2.02.1
Information specific to xamarinios
Assembly

System.ServiceModel.Primitives , Version=8.1.2.0, PublicKeyToken=b03f5f7f11d50a3a

Referencing

Your project needs a package reference to System.ServiceModel.Primitives.

Package System.ServiceModel.Primitives (8.1.2) netstandard2.0
Platform Restrictions

This framework does not have platform annotations.

  • Built-in API
  • Package-provided API