Following is the directory structure for System.Drawing Tests and samples.

Test/		(all the test classes go here)
	System.Drawing
	System.Drawing.Drawing2D
	System.Drawing.Imaging
	System.Drawing.Printing
	System.Drawing.Text

Samples/	(all the samples go here)

	General (samples that affect more than a single area of SD)
	System.Drawing
	System.Drawing.Drawing2D
	System.Drawing.Imaging
	System.Drawing.Printing
	System.Drawing.Text