C# - Delegates and Lambdas

Example 1

using System;

using System.Linq;

public class Program

{

    public delegate string Reverse(string s);

    static string ReverseString(string s)

    {

        return new string(s.Reverse().ToArray());

    }

    static void Main(string[] args)

    {

        Reverse rev = ReverseString;

        Console.WriteLine(rev("a string"));

    }

}

Example 2

using System;

using System.Collections.Generic;

public class Program

{

    public static void Main(string[] args)

    {

        List<int> list = new List<int>();

        for (int i = 1; i <= 100; i++)

        {

            list.Add(i);

        }

        List<int> result = list.FindAll(

          delegate (int no)

          {

              return (no % 2 == 0);

          }

        );

        foreach (var item in result)

        {

            Console.WriteLine(item);

        }

    }

}

Example 3

using System;

using System.Collections.Generic;

public class Program

{

    public static void Main(string[] args)

    {

        List<int> list = new List<int>();

        for (int i = 1; i <= 100; i++)

        {

            list.Add(i);

        }

        List<int> result = list.FindAll(i => i % 2 == 0);

        foreach (var item in result)

        {

            Console.WriteLine(item);

        }

    }

}