lambda expression are often used with Func and Action delegates.
Func and Action are predefined delegates with generic parameters.
delegate TResult Func ();
delegate TResult Func (T arg);
delegate TResult Func (T1 arg1, T2 arg2);
... and so on, up to T16
delegate void Action ();
delegate void Action (T arg);
delegate void Action (T1 arg1, T2 arg2);
... and so on, up to T16
Here is an example of how use to use Func to create a lambda expression.
using System;
class Program
{
public static void Main()
{
Func sqr = x => x * x;
Console.WriteLine(sqr(3));
}
}
The output:
9