Proj.Net

Proj.Net is a .NET 2.0 library that performs point-to-point coordinate conversions between coordinate systems. The spatial reference model used adheres to the simple features specification. Supports: * Datum transformations. * Geographic, Geocentric, and Projected coordinate systems. * Compatible with both Microsoft .NET 2.0, Mono, .NET Compact Framework & Silverlight. * Converts coordinate systems to/from Well-Known Text (WKT) and to XML.