Gets or sets a copy of the geometric world transformation for this Graphics.
Assembly: System.Drawing (in System.Drawing.dll)
GDI+ uses three coordinate spaces: world, page, and device. World coordinates are the coordinates used to model a particular graphic world and are the coordinates you pass to methods in the .NET Framework. Page coordinates refer to the coordinate system used by a drawing surface, such as a form or a control. Device coordinates are the coordinates used by the physical device being drawn on, such as a screen or a printer. The property represents the world transformation, which maps world coordinates to page coordinates.
Because the matrix returned and by the property is a copy of the geometric transform, you should dispose of the matrix when you no longer need it.