using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ConsoleApplication2

{

    class Program

    {

        static void Main(string[] args)

        {

            string outString = "This is the outString value";

            Console.WriteLine(outString);

            bool ok = outMethod(out outString);

            Console.WriteLine(outString);

            Console.WriteLine(ok.ToString());

            /*我是分隔线*/

            string refString = "This is the refString value";

            Console.WriteLine(refString);

            bool okk = refMethod(ref refString);

            Console.WriteLine(refString);

            Console.WriteLine(okk.ToString());

            Console.ReadKey();

        }

        static bool outMethod(out string str)

        {

            str = "This is the new outString value"; //必须设值

            return true;

        }

        static bool refMethod(ref string str)

        {

            str = "This is the new outString value"; //此句可以不写，即不用重新设值

            return true;

        }

    }

}