C # How to obtain the screen width and height

// 1. display the form in the lower right corner of the screen// This area does not contain the rectangle screenarea = system. Windows. Forms. Screen. getworkingarea (this) of the taskbar );
// This area includes the taskbar, which is the physical range displayed on the screen. Rectangle screenarea = system. Windows. Forms. Screen. getbounds (this); int width1 = screenarea. width; // screen width
Int height1 = screenarea. height; // screen height
This. Location = new system. Drawing. Point (width1-form width, height1-form height); // specify that the form is displayed in the lower right corner. // 2. Calculate the position of the child form in the middle of the parent formWaitform. Location = new point (this. Location. x + (this. Width-waitform. width)/2 ),
(This. Location. Y + (this. Height-waitform. Height)/2 ));