using System;

using System.Collections.Generic;

using System.Linq;

using System.Reflection;

using System.Runtime.InteropServices;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace Demo

{

    static class Program

    {

        /// <summary>

        /// 用于判断程序是否有重复启动的互斥量

        /// </summary>

        static System.Threading.Mutex _mutex;

        /// <summary>

        /// 应用程序的主入口点。

        /// </summary>

        [STAThread]

        static void Main()

        {

            //是否可以打开新进程

            bool createNew;

            /// 获取程序集Guid作为唯一标识，禁止程序重复启动

            Attribute guid_attr = Attribute.GetCustomAttribute(Assembly.GetExecutingAssembly(), typeof(GuidAttribute));

            string guid = ((GuidAttribute)guid_attr).Value;

            _mutex = new System.Threading.Mutex(true, guid, out createNew);

            if (false == createNew)

            {

                MessageBox.Show("程序已在本机运行，不能重复运行！", "系统消息");

                Application.Exit();

            }

            else

            {

                Application.EnableVisualStyles();

                Application.SetCompatibleTextRenderingDefault(false);

                _mutex.ReleaseMutex();

                Application.Run(new FrmMain());

            }

        }

    }

}