Just thought I would point out a great book while I was thinking about it. "Essential C# 3.0: For .NET Framework 3.5, Second Edition", it is a very well written book. Mark Michaelis does a great job of covering a large range of great topics and does a great job of explaining how you do things and why you do things. I've been using it to teach C# to several people and have had great success in using it. I use this book daily as a reference and I always make sure to have it next to me.

Recently  was looking for a book to use while I was training some developers and I came across "Beginning C# 3.0: An Introduction to Object Oriented Programming". Jack Purdum does an excellent job of explaining OOP, as well as the basics of development. I have had our developers reading through this book and they have been able to pick up on concepts very quickly. So if you need a good book, I would suggest taken a look at this one.

 UPDATE: Link fixed.. sorry

I recently came across this blog post and tool on the The HP Security Laboratory Blogs. The tool is called Scrawlr and I have to say that it is a pretty nifty little tool. I've been playing with it this morning and have been pretty impressed, I will keep it handy to do some testing in the future! Check out the Blog post and tool over at: http://www.communities.hp.com/securitysoftware/blogs/spilabs/archive/2008/06/23/finding-sql-injection-with-scrawlr.aspx. With all the SQL Injection press lately, it's worth checking out!