【源码】Fast2011 启动主进程只有一个

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Diagnostics;//引入Process 类
using System.Reflection;//引入Assembly
using System.Runtime.InteropServices;  //需要获取句柄，激活前一实例
using System.Threading;//需要用到mutex

namespace fasta2011
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        private const int WS_SHOWNORMAL = 1;
        [DllImport("User32.dll")]
        private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
        [DllImport("User32.dll")]
        private static extern bool SetForegroundWindow(IntPtr hWnd);
        [STAThread]
        static void Main()
        {
            Process instance = GetRunningInstance();
            if (instance == null)
            {
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new Form1());
            }
            else
            {
                HandleRunningInstance(instance);
            }    
            //Application.EnableVisualStyles();
            //Application.SetCompatibleTextRenderingDefault(false);
            //Application.Run(new Form1());    
        }
        public static Process GetRunningInstance()
        {
            Process current = Process.GetCurrentProcess();
            Process[] processes = Process.GetProcessesByName(current.ProcessName);

            foreach (Process process in processes)
            {
                if (process.Id != current.Id)
                    if (Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)
                        return process;
            }
            return null;
        }

        public static void HandleRunningInstance(Process instance)
        {

            ShowWindowAsync(instance.MainWindowHandle, WS_SHOWNORMAL);
            SetForegroundWindow(instance.MainWindowHandle);
        }
    }
}