Hi,

The id attribute in XML files is generated only when saving files and used for deserialization purposes, to identify related items such as link's origin and destination nodes. If you need unique identifiers in runtime, you could assign them to the Id or Tag properties of items. E.g. you could keep an integer counter and assign its value to each new item added to the diagram if values should be unique for the diagram only, or Guid.NewGuid result if values should be unique across all your diagrams.

I hope that helps,
Stoyan

Hi,

Right, you can access neighbor nodes via IncomingLinks and OutgoingLinks collections, for example using LINQ extensions:

var neighbors =
	node.IncomingLinks.Select(l => l.Origin).Concat(
	node.OutgoingLinks.Select(l => l.Destination));

foreach (var n in neighbors)
	n.Brush = Brushes.Red; 

I hope that helps,
Stoyan