dotNetRDF is a .Net Class Library for working with RDF and SPARQL programatically built with C# 3 for the .Net Framework 3.5/4.0/Silverlight 4 and WIndows Phone 7. It provides a simple object model for representing RDF, SPARQL Queries and Updates and understands all common RDF and SPARQL syntaxes.
Extensive documentation is available on the website and support is available via the mailing lists.
...It offers advanced SPARQL querying and handles Sesame server administrative tasks.
This tool is no longer actively maintained as my priorities and interests have shifted away from .Net development. If you are interested in taking over, drop me a line.
Metadata.net is a collection of website components and tools for creating and using metadata produced by the eResearch Group at ITEE, University of Queensland.
Microsoft .NET connector for the Fedora Commons repository system. Developed by Jeroen Suijkerbuijk, commissioned and sponsored by Maastricht University Library.