http://developers.de/blogs/andreas_erben/archive/2007/10/08/biztalk-rfid-eventhandler-recap.aspx(German version below) For those who are new to BizTalk RFID or have not used it in a while, here is a recap of the minimal requirements for implementing a EventHandler component. Inherit from RfidEventHandlerBase Parameterless constructor must be accessibleenCommunityServer 2008 SP1 (Build: 30619.63)