Little Gotcha in VS 2010

If you have a class library, and you want to write a Console app to test your class lib with, you might find you get a compile error that doesn't make sense:

The type or namespace name 'MyClassLib' could not be found (are you missing a using directive or an assembly reference?) 

This could be caused by the target framework being set to "client"

Here's how to fix it:

1. Right click the console app project, and select Properties (at the bottom of the menu).
2. Select the Application tab on the Property page
3. Check the Target Framework - make sure it is NOT .Net Framework 4.0 (or 3.5, if that's what you are using).
4. If it is client, you can just select the correct framework - in my case .Net Framework 4.0
5. When you select the new Framework, you will get a warning about unloading the project.  Who cares, it's wrong anyway!  :-)