ref keyword in c#.net | how to pass reference of the variable to other method using C# with ref keyword

ref keyword in c#.net

Ref keyword is useful for passing the reference address of the variable to other method. Before passing we must initialize that variable.

out is also a keyword in c#.net which is having bit different feature. We can see out keyword here.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace OOPSConcepts
{
    class Program
    {
        static void Main(string[] args)
        {
            //variable should be initialized before using with ref keyword.    
            int SeconeNumber=0;
            int result = 0;
            result = Add(ref SeconeNumber);
            Console.WriteLine(result); //40
            Console.WriteLine(SeconeNumber); //20
            Console.Read();

        }
        public static int Add(ref int secondNumber)
        {
           // we can assign any other value to variable
            secondNumber = 20;
            return secondNumber +20;
        }
    }
}

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