c# 防止exe重复启动

using System;
using System.Threading;
using System.Windows.Forms;

namespace MyWinFormsApp
{
     static class Program
     {
         // 定义一个全局互斥体
         private static Mutex mutex = new Mutex(false, "MyWinFormsApp_Mutex");

        [STAThread]
         static void Main()
         {
             // 尝试获取互斥体的所有权
             bool hasHandle = false;
             try
             {
                 hasHandle = mutex.WaitOne(0);
                 if (!hasHandle)
                 {
                     MessageBox.Show("程序已经在运行中，请勿重复启动！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                     return;
                 }
             }
             catch (AbandonedMutexException)
             {
                 hasHandle = true;
             }

            Application.EnableVisualStyles();
             Application.SetCompatibleTextRenderingDefault(false);
             Application.Run(new MainForm());

            // 释放互斥体
             if (hasHandle)
             {
                 mutex.ReleaseMutex();
             }
         }
     }
}