darrell.tunnell/Microsoft.SyncFrameworkv2.1.0.2

Installs the core MS Sync Framework redistributables (Synchronization-v2.1-x86-ENU.msi and Synchronization-v2.1-x64-ENU.msi) if they aren't allready installed, and then adds a reference for the 'Microsoft.Synchronization' assembly to your project. The msi distributables are obtained from here: http://www.microsoft.com/en-gb/download/details.aspx?id=19502