Hi there! From 2004 to 2009 I ran a company called "GeoFrameworks," publishing two components called GPS.NET and GIS.NET which helped developers quickly write location-based services. Now, I've released the source code for GPS.NET to CodePlex for you to use as you see fit.
GPS.NET 2.0 on CodePlex
GPS.NET 3.0 on CodePlex
... I've also released the source code of a library called the "GeoFramework," a collection of commonly used classes such as
Latitude,
Longitude,
Distance,
Speed, and
Position:
GeoFramework 1.0 on CodePlex
GeoFramework 2.0 on CodePlex
I'm now taking a break from programming, but I really appreciate the positive feedback from readers!