Callback in WCF?

Question

How do we use CallBack in WCF freely with events and delegates?

If the Client provides any request or any coincidence of the client’s conditions, then the services automatically trigger an event, the condition or request of which is transmitted from the client.

how is this possible?

Answer 1

A cleaner model is an event-driven event that uses a publish / subscribe template. Read this to get into both methods.

http://msdn.microsoft.com/en-us/magazine/cc163537.aspx

Answer 2

Basically, you define a service method as one-way, and also create a message callback. More details here: http://idunno.org/archive/2008/05/29/wcf-callbacks-a-beginners-guide.aspx