dotnetrdf 

ALPHA Release - dotNetRDF.Sparql.Core is a revised SPARQL API for dotNetRDF. Provides data structures for representing SPARQL commands and results and the Medusa in-memory query engine.

Provides an alterante SPARQL query engine which uses asynchronous pull-based evaluation. This package is experimental and may be signficantly altered or even withdrawn in a future dotNetRDF release.