Correct Import for ProfileCommon?

[Calavera]

Hi,
I have the following line my class

Dim objProfile As ProfileCommon = HttpContext.Current.Profile

When I compile the class I get the following error.
"error BC30002: Type 'ProfileCommon' is not defined."

Does anyone know the correct library to import for this ? I have tried
a bunch of different profile ones but the error remains.

Thanks Cal