wcf - How can I send fault on a duplex channel? -

Client and a server communication in duplex mode Client has a universal service (action = "*") because contract callbacks.

I think that the server is able to send blame to my client.

How can I

About any kind of setting In the

  action = NotificationData.NotificationAction  

NotificationA data is a messagecontact class in which Property is MessageId

  [MessageContract] Public class notification data {public const string notification acne = "http: //gfader.com/copied-from/tomasz.janczuk.org"; [MessageBodymember] Receive public string message { Set; } [Messebomember] Public Date Time Send Time {Receive; Set; } [MessageBodyMember] Receive public email messages {email; Set; }}  

Code on client:
if MessageId == 500 -> error from server