public Viewport Viewport { get; set; }

Public Property Viewport As Viewport
	Get
	Set

public:
property Viewport Viewport {
	Viewport get ();
	void set (Viewport value);
}

member Viewport : Viewport with get, set

Property Value

Usually, a graphics screen uses the full back buffer. But when the game is rendered into a IPresentationTarget, it can happen that the back buffer is larger than the current presentation target. The graphics screens and drawable objects should only use the portion of the back buffer that is specified by Viewport.

Reference