I have been pleasantly surprised this week to discover that there is a choice of tools for measuring Code Coverage. If you have Visual Studio Team edition, then if you are using MSTEST, then you have built-in code coverage, however even then you may need a standalone tool.

The tools I have found are (costs are per seat):

1) NCover  http://www.ncover.com/ (from $199 to $658 per seat) I have used it but it is very expensive.

2) PartCover http://sourceforge.net/projects/partcover/ - Free!  Steep initial learning curve to get it to work.

3) Dot Cover from http://www.jetbrains.com/dotcover/ - Personal licence - normally $99 but at a introductory price of $75 and free for OpenSource Developers (details at http://www.jetbrains.com/dotcover/buy/buy.jsp#opensource_)

4) Test Matrix from http://submain.com/products/testmatrix.aspx - $149 for a licence