【C#】 Mutex简单示例

namespace MutexTest
{
    class Program
    {
        //用于Mutex的Test
        static void Main(string[] args)
        {
            System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
            string dir = System.Environment.CurrentDirectory;
            dir = dir.Replace("/", "");
            dir = dir.Replace("\\", "");
            byte[] result = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(dir));
            string md5Text = System.Text.Encoding.Default.GetString(result);
            bool runOne;
            System.Console.WriteLine("目录层级的Muxtex测试，请点开多个此程序控制台：");
            //增加using防止Muxtex在程序运行时被垃圾回收
            using (System.Threading.Mutex run = new System.Threading.Mutex(true, md5Text, out runOne))
            {
                if (!runOne)
                {
                    System.Console.WriteLine("同一目录已经运行了一个程序实例,无法重复运行");
                    System.Console.ReadLine();
                    return;  //增加return语句，防止用户回车后继续运行程序；
                }

                try
                {
                    while (true)
                    {
                        //程序执行主体代码
                        System.Console.Write(".");
                        System.Threading.Thread.Sleep(1000);
                    }
                }
                finally
                {
                    //释放当前Mutex一次
                    run.ReleaseMutex();
                }
            }


        }
    }
}