using System;

public class Program

{

    public static void Main()

    {

         string text = "clever little fox jumped over the bridge";

​

            var replace = text.Replace("fox","dog");

            var remove = text.Remove(text.Length - 1);

            var insert = text.Insert(0,"very ");

            var substring = text.Substring(6);

            var charArray = text.ToUpperInvariant();

            Console.WriteLine(replace);  //will replace fox with dog

            Console.WriteLine(remove); //will remove e from last

            Console.WriteLine(insert); //very clever little fox jumped over the bridge

            Console.WriteLine(substring); //  little fox jumped over the bridge

            Console.WriteLine(charArray); //CLEVER LITTLE FOX JUMPED OVER THE BRIDGE

    }

}