winform無邊框窗體在最大化時，全屏和非全屏

winform中無邊框窗體最大化（FormBorderStyle = None），非全屏（不遮擋任務欄）和全屏（多屏情況下全屏顯示）的通用方法，如下：

 private void btnMax_Click(object sender, EventArgs e)

{

            if (this.WindowState ==FormWindowState.Maximized)
            {             
                this.WindowState = FormWindowState.Normal;
            }
            else
            {
                this.MaximumSize = Screen.FromHandle(this.Handle).WorkingArea.Size;
                this.WindowState = FormWindowState.Maximized;

            }       

}