using System;

public class Program

{

    public static void Main()

    {

        // Lambda expression as executable code.

        Func<int, bool> deleg = i => i < 5;

        // Invoke the delegate and display the output.

        Console.WriteLine("deleg(4) = {0}", deleg(4));

​

        // Lambda expression as data in the form of an expression tree.

        System.Linq.Expressions.Expression<Func<int, bool>> expr = i => i < 5;

        // Compile the expression tree into executable code.

        Func<int, bool> deleg2 = expr.Compile();

        // Invoke the method and print the output.

        Console.WriteLine("deleg2(4) = {0}", deleg2(4));

​

        /*  This code produces the following output:

​

            deleg(4) = True

            deleg2(4) = True

        */

    }

}