Open Source Forum Software in C#

dnfBB is a powerful and fast 3 Tier, C# discussion board or forum for websites running ASP.NET. Native support for multiple forums within the same db structure. Designed to work with Firebird and MySQL, support for additional RDBMSs in the future.

Yet Another Forum.net is a opensource discussion forum or bulletin board system for web sites running ASP.NET. It is ASP.NET based with a MS SQL backend database.