Each Diagram has an instance of this class as its PartManager property. If you want to customize the standard behavior, you can easily override any of its methods and substitute an instance of your custom part manager class for your diagram.

            public class CustomPartManager : PartManager {
              protected override String FindCategoryForNode(Object nodedata, IDiagramModel model, bool isgroup, bool islinklabel) {
                // maybe choose different category here, to dynamically determine the DataTemplate found by FindTemplateForNode
              }
            }
            

              <go:Diagram ...>
                <go:Diagram.PartManager>
                  <local:CustomPartManager />
                </go:Diagram.PartManager>
              </go:Diagram>
            

              myDiagram.PartManager = new CustomPartManager();
            

Although this class inherits from FrameworkElement in order to support data binding, it is not really a FrameworkElement or UIElement! Please ignore all of the properties, methods, and events defined by FrameworkElement and UIElement.

System.Object
   System.Windows.DependencyObject
      System.Windows.UIElement
         System.Windows.FrameworkElement
            Northwoods.GoXam.PartManager

Reference