FlowChart.NET version 6.5 contains the following new features and improvements -

Non-blocking layout methods
All graph layout classes now contain an async ArrangeAsync method that runs layout calculations in a background task. This is only available in .NET 4.5 build of the diagram assemblies.

async void OnLayoutLayered(object sender, EventArgs e)
{
	var layout = new LayeredLayout();
	await layout.ArrangeAsync(diagram);
	diagramView.ZoomToFit();
} 

Miscellaneous

• ImagePadding property of ShapeNode, TableNode and Cell lets you set padding space between element's borders and their Image.
• LinksPadding property added to LayeredLayout specifies how much space to leave between links when LinkType is set to Cascading.
• Merge indicators for cascading links now supported as counter-parts of branch indicators from the 6.4.3 release. Set the LinkMergeIndicator property to specify the indicator shapes and MergeIndicatorColor and MergeIndicatorSize properties to customize their appearance.
• Export overloads that write to Stream objects added to PdfExporter, VisioExporter and Visio2013Exporter.
• PageAdding validation event added too TabbedDiagramView.
• ContainerNodes now apply the TextPadding value.
• Public TreeViewConnectionPoint.Item property provides access to target TreeViewItem of links.

If anyone is interested in trying the beta version, please download this archive containing updated assembly files -
https://mindfusion.eu/_beta/fcnet65.zip

Any comments, questions and general feedback are welcome.