Ends drawing operations on the surface and returns true to indicate the success of the operations.
Drawing operations can only be issued between a BeginDraw and EndDraw call.
The BeginDraw method must be called before drawing operations can be called, though state-setting and state-retrieval operations can be performed even outside of BeginDraw/EndDraw.
The EndDraw method always succeeds: it should not be called twice even if a previous EndDraw resulted in a failing result.
The EndDraw method invalidates the surface with the specified rectangle passed in the BeginDraw Method and causes the surface to be redrawn.
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