c# winform取全屏幕大小

Winform，c#语句取(获取屏幕大小，包括全屏大小，除任务栏大小和全屏大小：

1.当前的屏幕除任务栏外的工作域大小
    this.Width = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Width;
    this.Height = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Height;

2.当前的屏幕包括任务栏的工作域大小
this.Width=System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width;
this.Height=System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height;

3.任务栏大小
this.Width=System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width-System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Width;
this.Height=System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height-System.Windows.Forms.Screen.PrimaryScreen.WorkingArea.Height;

4.winform实现全屏显示
WinForm:  
  this.FormBorderStyle   =   System.Windows.Forms.FormBorderStyle.None;  
  this.WindowState   =   System.Windows.Forms.FormWindowState.Maximized;  
  this.TopMost   =   true;