Hello 2001plus,

By default you cannot bind the UltraTree to two separate class objects. The sample I attached illustrates that a class can consist of multiple bindinglists, but they need to reside together. For example, the sample includes a class named Person. I created a couple lists of type Person to add to the tree. Then I created a new BindingList<Person>(list). Notice that the 'list' is referenced to indicate which list I want to bind. You can append the Concat IEnumerable to reference an additional list, like so:

var bindinglist = new BindingList<Person>(list).Concat(new BindingList<Person>(list2));

The sample even demonstrates a relationship by creating children nodes from another BindingList as well and placed within the Person class.