[Zope] Zope for .NET

[Brian Sullivan]

I am looking for an open source .NET framework that includes user
management, authentication, multiple configurable levels of security,
tools for html generation and is data base agnostic or includes some
sort of built in data base.

It would be nice if it had a host of open source add ins. Basically
Zope functionality for .NET.

Is there anything like that out there -- or even something close?