How to add users and roles to ASP.NET membership database programatically

Hi there,

in our ASP.NET application, we are using the ASP.NET membership database, which is integrated into our own database.
We have a couple of SQL scripts, to install the entiere database (first creating the whole structure and then insert some data to tables that hold necessary data).
During this installation process we would also like to add some users and roles to the membership database. These users and roles need to be existing before the webapplication is run the first time.

What would be a proper way to achieve this?
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