We have released version 2.6 of WpfDiagram. It adds the following new features and improvements:

CompositeLayout algorithm
CompositeLayout partitions the diagram into several subgraphs and applies the algorithm specified via the SubgraphLayout property on each part. If the part is a tree, it is arranged using the algorithm specified via the SubtreeLayout property, which is set to a radial TreeLayout instance by default. Finally the algorithm specified via MasterLayout is applied on the graph that represents the overall partition. By running the polynomial-complexity layout algorithms on small subgraphs, CompositeLayout is able to process a large graph much faster than if a layout algorithm is applied on the whole graph.

CompositeLayout can run on custom partitions specified as lists of nodes, or automatically partition the diagram via two automatic methods based on graph connectivity and graph path lengths. Set the PartitionMethod and CustomPartition properties to specify how the diagram should be partitioned.

Other layout improvements
~ If there is only one used execution path after a branching and up to two empty ones, FlowchartLayout will now center the used path under the branching start node.
~ OrthogonalLayout now produces more compact layouts with less link bends if MinimizeLinkBends is enabled.
~ If the Radius of CircularLayout is set to 0, the algorithm automatically selects a radius that fits all nodes along the circle's circumference.
~ KeepLaneSizes property added to the SwimlaneLayout algorithm.

Miscellaneous
~ Now it is possible to resize multiple nodes simultaneously. To enable this, set AllowMultipleResize to true.
~ New sample project shows how to display multiple views for the same diagram.

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!