what is the use of ()=> in silverllight

Question

Can you say what is the use of the ()=> and =>? I saw this in a code. I did not get any reference for this.

this.Dispatcher.B         


        

Answer 1

This notation is that of a lambda expression which takes no argument. If the lambda expression made use of arguments they would be declared in the empty set of parenthesis as in say...

this.Dispatcher.BeginInvoke((x, y) => { do some' with x and/or y }, 12, somevar);

In a nutshell, lambda expressions allows creating "nameless" functions, right where they are needed.
In the example of the question, the BeginInvoke() method requires its first parameter to be a delegate (a "pointer to a method"), which is exactly what this lambda expression provides.