Public Sub DoNodeAdded( _
   ByVal nodedata As NodeType _
) 

public void DoNodeAdded( 
   NodeType nodedata
)

Parameters

nodedata

This is used for model update, when the model data has changed and the model itself needs to be updated to reflect those changes.

If the NodesSource collection implements System.Collections.Specialized.INotifyCollectionChanged, the model will automatically call this method. Otherwise, you need to do so immediately after the NodesSource has been augmented.

This raises a Changed event with a value of ModelChange.AddedNode.

Reference