What alternatives are there in OS projects for c# similar to Joomla/Mambo/Drupal?

Question

I'm beginning a project with a client to build a web application and I'm a little stuck on which solution to go with.

I've used Joomla for many clients in the past, but this client has specific requests that I KNOW I'm going to have to build myself.

The problem I'm facing is that I work full time under the .NET spectrum and while I am a novice developer in PHP, and I've been studying Joomla's plug in architecture for about a month now, I am a lot more comfortable building something in ASP.NET than I am in PHP.

My question is, what OS projects are out there that have a similar community following as Joomla/Mambo/Drupal, along with a plug in architecture that is somewhat akin to Joomla as well?

I don't really have the time to build out a full blown CMS system in ASP.NET, but if something already exists that can give me X% (25%, 50%, something) of what Joomla has that will at least get me on the right path. Joomla just has too many extensions and too much of a community backing for me to pass it up if there's not something comparable in the ASP.NET realm.

Answer 1

N2 looks quite nice, I haven't been using it though: http://n2cms.com/

Answer 2

in addition to N2, mentioned above (of which i am a big fan), there's an option (for really brave souls!) to run Drupal on top of .Net with Phalanger compiler -- it requires several patches to Phalanger and at least one fix to Drupal itself (session cookie handling stuff, to be precise). As a reward, you'll get a performance bust plus all the goodies of .Net development tools.