C #4.0 new feature learning (4)-anonymous method and Lambda expression

C # anonymous methods and lambda expressions are supported from 3.0.

1. Anonymous Method

Adddelegate del = delegate (int I, Int J)
{
Return I + J;
};
Console. writeline (DEL (5, 6 ));

Pay attention to the syntax features of the anonymous method.

2 lambda expressions

You can use lambda expressions to further simplify the above Code:
Adddelegate d = (I, j) => {return I + J ;};
Console. writeline (D (5, 6 ));
Among them, the Type I and J can be omitted, and the compiler will automatically infer.

Lambda expressions can be used in combination with generic delegation, for example:

Func <int, Int, int> func = (I, j) => {return I + J ;};
Console. writeline (func (5, 6 ));

If no parameter is input, you can directly write (), for example:
Action action = () => {console. writeline ("Hello, world! ");};
Action ();