asp.net 2.0 login data

Hi,
I have implemented login security into the asp.net 2.0 web application.
Now I see that there is a file called ASPNETDB.MDF in the App_Data folder of the project. I do know that during the configuration I assigned a new database in sql server to keep these security settings, i.e users, etc...
My question is that is it ok to delete the .mdf file which is in the App_Data folder as it does not seem to be used?
And is it best to have one database in the sql server which holds the data as well as the security settings or is it best to have a separate database, i.e. one for data and one for the security?
Thanks

Don't delete it.

All your security services related to SQL Server are implemented in that MDF, it contains views, SPs, and all that other SQL 'stuff'.

Hi,
Yes, I can see what the .mdf in APP_Code folder contains.
But where a user's data changes then only the .mdf in sql server gets changed and not the .mdf in app_Code
Thanks