Please Guide me for Multi Database Provider

Hi,

i'm using C# (WPF) in visual studio 2010 beta ....

i want write a application that normal users make daily record in databse, for this normal users, i need embeded database like "SQL Compact", and for special user that merge normal users records, i need a faster database like "MS SQL" or "MySQL".
and now, any idea how to have ability to changing between database system (like : SQL Compact, MS SQL, MySQL or ...) in my application ?


ps: sorry for bad english ^_^

Using Microsoft enterprise library 4.1, should help a lot.