The GoToTags .NET NFC SDK is a .NET 4.0 software development kit designed to allow developers to easily develop Microsoft Windows based desktop applications that can read and encode NFC tags and NDEF messages. The SDK supports a wide range of NFC readers and NFC tags and works on almost all versions on Windows. The SDK is licensed per-developer and can be purchased online. Sample code and a test application are available online for free. Technical support is included with the license.
Example Code using the GoToTags .NET NFC SDK