C# 用Mutex或进程限制一台电脑上同时打开多个实例

private void Form1_Load(object sender, EventArgs e)
        {
            bool requestInitialOwnership = true;

bool mutexWasCreated;
            System.Threading.Mutex m = new System.Threading.Mutex(requestInitialOwnership, Application.ProductName, out mutexWasCreated);
            if ( !mutexWasCreated)
            {
                Application.Exit();

}

}