It seems security is becoming more and more of a focus at Microsoft.  This of course is a very good thing and interests me a lot since I focus on security issues as one of my top priorities.  The MSDN Channel9 Security Wiki has introduced a set of .NET code examples to do common security tasks.  These tasks are separated into different categories according to what function they perform.

 

The categories for the code samples are:

 

*  Authentication

*  Cookies

*  Cryptography

*  Data Access

*  I/O

*  Input Validation

*  Registry

*  Viewstate

*  Web Services

 

These contributed articles have both C# and VB.NET versions available and are very useful as a day to day reference on security issues within your code.  There are a few topics I'd like to see added to this list, but that will come with time.