using System;

public class Program

{

    public static void Main()

    {

           string s1 = "Good";

        string s2 ="Morning";

        string s3=string.Concat(s1, s2);

        Console.WriteLine(s3);

        Console.WriteLine("The Length of the Resultant String is : " +s3.Length);

         Console.WriteLine("Resultant String in UpperCase : {0}", s3.ToUpper());

         Console.WriteLine("Resultant String in LowerCase : {0}", s3.ToLower());

    }

}