Delegates and Callbacks

Question

Does the term callback in the context of delegates mean ,\"a delegate delegating it works to another delegate inorder to finish some task\" ?

Example :(

Answer 1

A callback is basically a delegate passed into a procedure which that procedure will "call back" at some appropriate point. For example, in asynchronous calls such as WebRequest.BeginGetResponse or a WCF BeginXxx operation, you'd pass an AsyncCallback. The worker will "call back" whatever method you pass in as the AsyncCallback, in this case when it's finished to let you know that it's finished and to obtain the result.

An event handler could be considered another example. For example, when you attach a handler to a Click event, the button will "call back" to that handler when the click occurs.