YetAnotherForum Web Hosting
What’s YetAnotherForum?
YetAnotherForum.NET(YAF) is an Open Source discussion forum or bulletin board system for web sites running ASP.NET. The latest version is ASP.NET v2.0 with a Microsoft SQL Server backend. The full C# source code is available licensed as GPL.
YAF Features:

100% C# ASP.NET
Microsoft SQL Server 2000/2005 database support.
User configurable cultures. See dates and numbers [...]