The tree node that was added to the collection.
The TreeNode.Name property corresponds to the key for a System.Windows.Forms.TreeNode in the System.Windows.Forms.TreeNodeCollection.
The tree node is added to the end of the collection. You can also add new System.Windows.Forms.TreeNode objects to the collection by using the TreeNodeCollection.AddRange(TreeNode[]) or erload:System.Windows.Forms.TreeNodeCollection.Insert methods.
The imageIndex parameter refers to an image in the TreeView.ImageList property of the parent System.Windows.Forms.TreeView.
The selectedImageIndex parameter refers to an image in the TreeView.StateImageList property of the parent System.Windows.Forms.TreeView.