C#

using System;

using System.Collections.Generic;

using System.Text;



namespace ConsoleApplication1
{

    class Program
    {



        static int Fact(int n)
        {

            if (n <= 1)

                return 1;

            return n * Fact(n - 1);

        }



        static int Factorial(int n)
        {

            if (n <= 1)

                return 1;

            int result = 1;


            {
 for (int i = 2; i <= n; i++)
                result = result * i;

            }

            return result;

        }





        static void Main(string[] args)
        {





            Console.Write("Enter a Number to find factorial: ");

            int n = Convert.ToInt32(Console.ReadLine());

            int r = Fact(n);

            Console.WriteLine(n.ToString() + "! = " + r.ToString());



            Console.Write("Enter a Number to find factorial: ");

            n = Convert.ToInt32(Console.ReadLine());

            r = Factorial(n);

            Console.WriteLine(n.ToString() + "! = " + r.ToString());

            Console.Write("Enter a Number to find factorial: ");

            n = Convert.ToInt32(Console.ReadLine());

            r = Factorial(n);

            Console.WriteLine(n.ToString() + "! = " + r.ToString());

            Console.Write("Enter a Number to find factorial: ");

            n = Convert.ToInt32(Console.ReadLine());

            r = Factorial(n);

            Console.WriteLine(n.ToString() + "! = " + r.ToString());

            Console.Write("Enter a Number to find factorial: ");

            n = Convert.ToInt32(Console.ReadLine());

            r = Factorial(n);

            Console.WriteLine(n.ToString() + "! = " + r.ToString());


            Console.ReadLine();
        }

    }

}

<pre lang="c#">void Page_Load(Object sender, EventArgs e)
  {
    if (!IsPostBack)
    {
      // Retrieve the root menu item from the Items
      // collection of the Menu control.
      MenuItem homeMenuItem = NavigationMenu.Items[0];

      // Retrieve the Movie submenu item from the ChildItems
      // collection of the root menu item.
      MenuItem movieSubMenuItem = NavigationMenu.FindItem(@"Home\Movies");

      // Remove the Movie submenu item.
      if (movieSubMenuItem != null)
      {
        homeMenuItem.ChildItems.Remove(movieSubMenuItem);
      }
    }
  }

class A {
   public void Hello( )  {
System.Console.WriteLine("Hello World ");
                                          } 
              } 
//********************************
class B <T>  where T:A
{   //  case 1    }
//**********************************
Class C <T> T: A
{// case2       }