Public Overloads Function MakeBitmap( _
   ByVal bmpsize As Size, _
   ByVal dpi As Double, _
   ByVal viewpos As Point, _
   ByVal scale As Double _
) As BitmapSource

public BitmapSource MakeBitmap( 
   Size bmpsize,
   double dpi,
   Point viewpos,
   double scale
)

Parameters

bmpsize

the size of the resulting bitmap

dpi

bitmap resolution [ignored in Silverlight]

viewpos

a Point in model coordinates

scale

a value of 1.0 is normal; the value must be a positive number. Smaller values produce smaller-looking parts.

Return Value

The diagram must already be visible and fully initialized before this method is able to render anything.

In Silverlight the rendering of the contents of the bitmap occurs asynchronously. Although a BitmapSource is returned immediately, it will not immediately contain the expected bits. In order to programmatically access the contents of the bitmap, you should call MakeBitmap(Size,Double,Point,Double,Action<BitmapSource>). In Silverlight any background GridPattern is not rendered.

This just returns MakeBitmap(bmpsize, dpi, viewpos, scale, null)

Reference