I just went through this. Refactoring doesn't work with Namespaces.
>Ouch! Have you looked at the refactoring capabilities?
>
>>Hi,
>>I have created 30-40 classes in six difference namespace. I would like to changed the naming convention of my namespace.
>>
>>Anyway for me to make this change easily? Is "seach & replace" a safe way to do this?
>>
>>Thank you
State of Florida, DCF