using System;

public class Program

{

    public static void Main()

    {

        string firstname;

        string lastname;

        firstname = "lakshmi";

        lastname = "devarapalli";

        Console.WriteLine(firstname.Clone());

        Console.WriteLine(firstname.CompareTo(lastname));

        Console.WriteLine(firstname.Contains("ks")); 

        Console.WriteLine(firstname.EndsWith("i")); 

       Console.WriteLine(firstname.Equals(lastname));

        Console.WriteLine(firstname.IndexOf("h")); 

        Console.WriteLine(firstname.ToLower());

        Console.WriteLine(firstname.ToUpper());

       Console.WriteLine(firstname.Insert(0, "Hello")); 

        Console.WriteLine(firstname.Length);

        Console.WriteLine(firstname.Remove(5));

        Console.WriteLine(firstname.Replace('i','a')); 

      Console.WriteLine(firstname.StartsWith("l")); 

        Console.WriteLine(firstname.Substring(2,5));

    }

}

​

​

​