using System;

​

public class Program

{

    public void display(out int n){

        int n1=30;

        n=n1;

        n +=n;

        Console.WriteLine("Inside the method : "+n);

    }

    public static void Main()

    {

        int num = 50;

        Program p1 = new Program();

        Console.WriteLine("Before method : "+ num);

        p1.display(out num);

        Console.WriteLine("After Method : "+ num);

    }

}