public GraphObjectsLibrary()
 {
     shapeSummmaries = new ShapeSummaryCollection();
     conSummaries = new ConnectionSummaryCollection();
 }
 /// <summary>
 /// Default constructor
 /// </summary>
 public GraphObjectsLibrary()
 {
     shapeSummmaries = new ShapeSummaryCollection();
     conSummaries    = new ConnectionSummaryCollection();
 }