Save XML

How I can to save/load a graph with this model xml

Or the EntityRelationship.xaml Example

Many of the samples load (or both load and save) XML representations of their diagram models.

So you can just search the demo’s source code for methods that Load or Save.

Doesn´t read sub between

Well, you can write your own code to traverse the XML DOM.

In fact, the OrgChart sample does exactly that, using the XML data that you just selected.