1、WPF双击事件 别走弯路-CSDN论坛.html（https://bbs.csdn.net/topics/392493855?list=2474794）

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 private void MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            switch (e.ClickCount)
            {
                case 1://单击
                    {
                        NativeMethods.SendMessage(Hwnd, (int)WindowMessages.WM_NCLBUTTONDOWN, (IntPtr)HitTest.HTCAPTION, IntPtr.Zero);
                        break;
                    }
                case 2://双击
                    {
                        WindowState = WindowState == WindowState.Maximized ? WindowState.Normal : WindowState.Maximized;
                        break;
                    }
            }

 

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