using System;

public class Program

{

    public static void AddFive( int number) 

    {

        number = number + 5;

        Console.WriteLine("call method number for \" value\" type is "+number);

    }

    public static int AddFiveMinus (ref int number2 )

    {

        number2 = number2 -1;

        Console.WriteLine("call method numberfor \" ref\" type is "+number2);

        return number2;

    }

    public static void Main()

    {

        int number = 20;

        Console.WriteLine("Main Method 1st nmber for \" Value\" type is {0}",number);

        AddFive( number);

        Console.WriteLine("Main Method 2nd nmber for \" Value\" is {0}\n\n",number);

        int number2 = 20;  // For 'ref' type modifier value need to be initialize here in Main method not the called method

        int result = AddFiveMinus(ref number2);

        Console.WriteLine("Main Method 2nd nmber for \" ref\" type is {0}",result);

​

    }

}