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Groups the elements of a sequence according to a key selector function.
The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value.(Defined by Enumerable.)Overloaded.
Observable Collection is a generic dynamic data structure that has the ability to send notifications when items are added, removed or when the collection is refreshed.
The MSDN states: "Represents a dynamic data collection that provides notifications when items get added, removed, or when the whole list is refreshed." Reference: Observable Collection class is shown below: To ensure that the Data Grid is refreshed if any item in the collection is changed, we should take advantage of the Property Changed Event Handler event handler.
seeing your binding for the items source would help to answer this question.
as you are assigning it in code you might just be setting it to be a single element, not a collection I've updated the question with the relevant details - "root" is just a Node like all the others.
Also, when the membership of one of the Children collections is programmatically modified, the changes are correctly reflected in the Tree View.
This may be the unusual thing that is causing things not to work for me.
The keys are compared by using a comparer and each group's elements are projected by using a specified function.(Defined by Enumerable.)Overloaded.
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.
The generic List represents a strongly typed list of elements or a CLR or non-CLR type. NET using such a list, the data in the data bound control is up to date with the data in the list.
However, when the data in the list changes, the data control has to be re-bound to reflect the changes.