/// <summary>
 /// Closes the client asynchronously.
 /// </summary>
 public void CloseAsync()
 {
     ProxiedClient.CloseAsync();
 }
 /// <summary>
 /// Closes the client asynchronously.
 /// </summary>
 /// <param name="userState">User-specific state.</param>
 public void CloseAsync(object userState)
 {
     ProxiedClient.CloseAsync(userState);
 }