public static void OpenBehaviorForElement(EA.Repository repository, EA.Element el)
 {
     // find the diagram
     if (el.Diagrams.Count > 0)
     {
         // get the diagram
         var dia = (EA.Diagram)el.Diagrams.GetAt(0);
         // open diagram
         repository.OpenDiagram(dia.DiagramID);
     }
     // no diagram found, select element
     repository.ShowInProjectView(el);
 }