TreeNodeCollection Control Property C#

Unfortunately I'm very new to different control properties and was wondering why the following code doesn't work when I try to set the开发者_运维百科 TreeNodeCollection. Is there another way I would be able to obtain a continuous layered "list"?

public TreeNodeCollection MenuItems { get; set; }

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MenuItems is already instantiated, just use this

MenuItems.AddRange(yourList);