<PackageReference Include="System.ServiceModel.Primitives" Version="6.2.0" />

System.ServiceModel.ICommunicationObject

public interface ICommunicationObject
namespace System.ServiceModel { public interface ICommunicationObject { CommunicationState State { get; } event EventHandler Closed; event EventHandler Closing; event EventHandler Faulted; event EventHandler Opened; event EventHandler Opening; void Abort(); void Close(); void Close(TimeSpan timeout); IAsyncResult BeginClose(AsyncCallback callback, object state); IAsyncResult BeginClose(TimeSpan timeout, AsyncCallback callback, object state); void EndClose(IAsyncResult result); void Open(); void Open(TimeSpan timeout); IAsyncResult BeginOpen(AsyncCallback callback, object state); IAsyncResult BeginOpen(TimeSpan timeout, AsyncCallback callback, object state); void EndOpen(IAsyncResult result); } }