I was looking for same and came across an Indian crowd whose book Secrets of an Accounting package in .Net and SQL 2000 published by VK Publishers with Full Source Code!
Yeah Right! - If you want to type it all in yourself. What a waste of money. I have it here at half price if anyone wants it.
I requested the source code and was advised that it was not available. The program itself uses the most basic of approaches to accounting - so you'll learn nothing.
Altogether a total waste of time - so avoid like the plague.
I'd be interested in others opinions.