干掉进程

//干掉进程
        private void KillProcess(string processName)
        {
            //获得进程对象，以用来操作   
            System.Diagnostics.Process myproc = new System.Diagnostics.Process();
            //得到所有打开的进程    
            try
            {
                //获得需要杀死的进程名   
                foreach (Process thisproc in Process.GetProcessesByName(processName))
                {
                    //立即杀死进程   
                    thisproc.Kill();
                }
            }
            catch (Exception Exc)
            {
                throw new Exception("", Exc);
            }
        } 

 

只允许程序运行一次

 /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            // 控制仅打开单实例进程
            if (System.Diagnostics.Process.GetProcessesByName

(System.Diagnostics.Process.GetCurrentProcess().ProcessName).Length == 1)
            {
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new frmControl());
            }
            esle
               messagebox.show("该程序已在运行","提示");
        }