using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace ConsoleApplication25

{

    public class Program

    {

     public static void Main(string[] args)

        {

            int val1 = 0;

            Refrun(ref val1);

            Console.WriteLine(val1);

            Console.ReadLine();

        } static void Refrun(ref int value)

        {

            value=1;

        }

    }

}

​