using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        // Student collection

        IList<string> strList1 = new List<string>() { 

            "One",

            "Two",

            "Three",

            "Four"

            };

        IList<string> strList2 = new List<string>() { 

            "One",

            "Two",

            "Five",

            "Six"

            };

        var innerJoinResult = strList1.Join(// outer sequence 

                      strList2,  // inner sequence 

                      str1 => str1,    // outerKeySelector

                      str2 => str2,  // innerKeySelector

                      (str1, str2) => str1);

​

        foreach (var str in innerJoinResult)

        {           

            Console.WriteLine("{0} ", str);

        }

    }

}

​