We have released version 2.2.1 of WpfDiagram. It provides the following new features:

~ the DiagramItem.Query method implements relationship queries on the graph
~ QuickRouter now avoids link routes that include long U bends
~ LayeredLayout can straighten links that cross multiple layers in the graph
~ show visual effects during item modification by setting ModificationEffect
~ TableNode.GetSpannedCellRect returns the bounds of TableNode cells
~ set ExpandButtonPosition to Custom to show +/- icons at custom positions
~ Behavior can be set to LinkTreeViews or DrawTreeViews
~ the Insert method of the lanes Grid can be used to insert new lanes
~ the DrawLaneHeader event allows rendering custom graphics inside lane grid headers

Registered customers with an active upgrade subscription will receive their upgrades shortly.      
     
A trial version is available for download here:      
https://mindfusion.eu/WpfDiagTrial.zip
     
Enjoy!