//窗体覆盖任务栏
this.TopMost = true;
this.Location = new Point(0, 0);
this.Size = new Size(Screen.PrimaryScreen.Bounds.Width,Screen.PrimaryScreen.Bounds.Height);
//窗体覆盖任务栏
this.FormBorderStyle = FormBorderStyle.None;
this.WindowState = FormWindowState.Maximized;