Are there any code coverage tools for manual testing? For example, if I write 30 new lines of code, compile, then run, is there any way to quickly verify that all 30 lines were
Getting 100% coverage is probably overkill -- and there are some cases where even when all lines are covered, the tool may not show it. That being said, you should check out the code coverage tools in Visual Studio Team System or any of a number of external coverage tools, such as nCover. Team System allows you to define testing-related checkin policies that may allow you to do what you want with regard to making sure that checked in code has been tested.