Free ASP.NET CMS for library

We have library website written in classic ASP that allows to browse and search by multiple (50+) filter criterias (author, publication year, ISSN ... ). There are lots of security holes and we have only开发者_开发知识库 one developer who hardly maintain this ASP-site with some minor features for last 3 years. There are two common user groups - administrators (librarians) and students (5000+) who have books on hands and search for them.

We don't want to rewrite site from scratch, just to use standard free CMS (.net based) and migrate library data and user accounts with minimum effort. What CMS will you suggest?

What do you think of SharePoint? It has out-of-the-box Visual Studio 2010 support so it looks promising (but we have no experience with this CMS)

Thank you in advance.

I have used DotNetNuke in the past and was pretty satisfied with it. Another one to try is Umbraco. Also, this Wikipedia article has a huge list of CMS systems broken down by language and cost.

SharePoint Foundation (formerly SharePoint Services) could certainly be customized to meet your needs. However, its learning curve will be much steeper than some of the other options mentioned, and it doesn't sound like you would use enough of its features (collaboration, document management, etc) to justify that additional cost.

MojoPortal. Free .net based CMS. More Info.

Use Dotnetnuke. It has years of development effort a lot of lot plugin modules and a vibrant community.