c# - 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.BeginInvoke(()=>
{
    //some thing..
};

Answer 1

=> is the lambda operator in C# and is read as "goes to". A lambda expression is an anonymous function and can be used to create a delegate.

Your example takes no arguments as indicated by the empty parens preceding the lambda operator. A lambda expression with one argument might look like this:

n => n.toString()

That expression would return the string representation of n, when invoked. A lambda expression can have multiple arguments as well, contained in parentheses:

(n, f) => n.toString(f)

A common use would be in a Func<T>:

Func<int, string> getString = n => n.toString();
int num = 7;
string numString = getString(num);

This is, of course, a silly example, but hopefully helps to illustrate its use.