using System;

public class Program

{

    public static void Main()

    {

        //creating the object of employee class first and implementing the call by value concept.

            String m = "sunil";

            employee emp = new employee();

            emp.display(200,m);

            Console.WriteLine("value in variable m is" +" "+m);

​

          //creating the object of employee class first and implementing the call by Reference concept 

            string msg="Hello";

            student st = new student();

            st.show(ref msg);

            Console.WriteLine("value in msg is" +" "+msg);//value at address msg will  be print,because here address is copy not value thatswhy at same address value will be print 

    }

    public class employee

        {

            public void display(int a, String b)

            {  

                a= 100;

                b="Dhaval";

                Console.WriteLine("Integer value is"+" " +a);

                Console.WriteLine("String value is" + " " + b);

            }

​

        }

        public class student

        {

            public void show(ref String str)

            {

                Console.WriteLine("value in str variable was"+" "+str);

                str = "Dhaval";

            }

        }

}