Gets or sets whether this Diagram has a default value for 
Model, an empty 
Northwoods.GoXam.Model.UniversalGraphLinksModel.
 
            
            
            
            
            
            
            
            public bool HasDefaultModel {get; set;}
             
        
             
        
            
            
            Property Value
            The initial value is true.
            Set this to false if you want to bind the Diagram.Model.