this.FormBorderStyle
= FormBorderStyle.None;
this.MaximumSize = new
Size(Screen.PrimaryScreen.WorkingArea.Width,
Screen.PrimaryScreen.WorkingArea.Height);
this.WindowState =
FormWindowState.Maximized;
FormBorderStyle.None 时候最大化不遮盖任务栏
原文：http://www.cnblogs.com/xm_cpppp/p/3539269.html
