using System;

public class Program

{

    public static void Main()

    {

        //create class instance

        Program p= new Program();

        //call method using class instance created above

        p.AddTwoNumber();

    }

    //void is return type, means it will not return anything

    //public is acces type, means it can be accessed from anywhere in the program

    public void AddTwoNumber()

    {

         int a=10, b=20;

         int c= a+b;

         Console.WriteLine("Sum ="+c);  

    }

}