The Code in the book of <Illustrated C# 2012> (Fourth Edition), Daniel M. Solis
Original English language edition, entitled Illustrated C# 2012, Fourth Edition by Daniel M. Solis, published by Apress, 2855 Telegraph Avenue, Suite 600, Berkeley, CA 94705 USA.
Copyright 2012 by Daniel M. Solis. Simplified Chinese-language edition copyright 2013 by Posts & Telecom Press. All rights reserved.