We have released version 2.8 of WpfDiagram. It adds the following new features and improvements:

Virtualization
VirtualizingDiagram can display very large diagrams where there are actual DiagramNode and DiagramLink instances created only for the elements that should be currently shown on screen. This helps keeping the WPF visual tree small and could lead to huge performance improvements if there are thousands of elements in the diagram.

The data items that should be displayed as nodes must be assigned to the NodesSource property, and the data items that should be displayed as links must be assigned to the LinksSource property. The BindingMode property specifies whether the data source should be updated when the user draws new diagram items interactively.

Miscellaneous
~ The Id property added to DiagramItem allows assigning custom identifiers to items. It can also be used to just store additional custom data similarly to Tag.
~ Call FindLinkById and FindNodeById to find items by their Id.
~ HookHeaders enables lane headers to be anchored to the left and top sides of the control's visible area.
~ Improved path-finding for long links in QuickRouter.
~ StartPoint and EndPoint provide a shortcut to setting the first and last control points of a DiagramLink.

Registered customers with an active upgrade subscription can download the licensed version from the clients area on our site.
    
A trial version is available for download here: 
https://mindfusion.eu/WpfDiagTrial.zip

Enjoy!