Forgive me if this screams newbie but what does
In C# the lambda operator is written "=>" (usually pronounced "goes to" when read aloud). It means that the arguments on the left are passed into the code block (lambda function / anonymous delegate) on the right.
So if you have a Func or Action (or any of their cousins with more type parameters) then you can assign a lambda expression to them rather than needing to instantiate a delegate or have a separate method for the deferred processing:
//creates a Func that can be called later Func<int,bool> f = i => i <= 10; //calls the function with 12 substituted as the parameter bool ret = f(12);