using System;

delegate int NumberChanger(int n);                  

public class Program

{

       static int num=10;

       public  static int AddNum(int p)

       {

          num += p;

          return num;   

       }        

       public static int MultNum(int q)

       {

         num *=q;

         return num;

        } 

        public static int getNum(){

         return num;

        }    

   public static void Main(){

      NumberChanger nc1=new NumberChanger(AddNum);

      NumberChanger nc2=new NumberChanger(MultNum);  

      nc1(25);

      Console.WriteLine("Value of Num:{0}",getNum());

      nc2(5);

      Console.WriteLine("Value of Num:{0}",getNum());   

   }

} 

​