Symptom: When deploying a solution to a handheld device using Visual Studio 2005, you get the error "Referenced package not found File: Device Connectivity Component".  Frequently, this error occurs after upgrading a visual studio 2003 solution.

Solution: Close Visual Studio and rename the CoreCon directory.  This directory is usually here: C:\Documents and Settings\[username]>\Local Settings\Application Data\Microsoft\CoreCon.  After renaming the directory, restart Visual Studio and deploy the solution.