using System;

public class Program

{

    public void retVal(ref int a,ref int b)

    {

        a+=10;

        b=b-5;

    }

    public static void Main()

    {

        Program p = new Program();

        int a=5,b=5;        

        Console.WriteLine("Before a call: {0}",a);

            Console.WriteLine("Before b call: {0}",b);

        p.retVal(ref a,ref b);

            Console.WriteLine("After a call: {0}",a);

            Console.WriteLine("After b call: {0}",b);

    }

}