public static void SetAssociationEntry(DependencyObject obj, CommandOnEventAssociation value)
        {
            if (null == obj)
            {
                throw new ArgumentNullException("obj", "Unable to set mapping entry on null dependency object.");
            }

            obj.SetValue(AssociationEntryProperty, value);
        }
        public static void SetAssociationEntry(DependencyObject obj, CommandOnEventAssociation value)
        {
            if (null == obj)
            {
                throw new ArgumentNullException("obj", "Unable to set mapping entry on null dependency object.");
            }

            obj.SetValue(AssociationEntryProperty, value);
        }