DF1Comm package is available for download from NuGet http://www.nuget.org/packages/DF1Comm/
Credits to Archie Jacobs of Manufacturing Automation, LLC for the original version of this library. See the original version of this Allen Bradley DF1 Protocol library at SourceForge.
This library no longer relies on the SerialPort.BytesToRead property which is not available on the Raspberry Pi and other platforms.