t code. Most
of the add-in samples provided with NUnit are currently version dependent.

<li>If you place the definition of a custom attribute in the same assembly as your
add-in, then user tests are dependent on the add-in assembly. If the add-in is 
version-dependent, then the user tests will also be version-dependent. We suggest
placing any types referenced by user tests in a separate assembly, particularly if
your extension relies on nunit.core.

<li>If using Visual Studio, set Copy Local to false for a