Contains node identifier (empty string for the root, null reference if unknown).
DISPID (Dispatch ID):
For more information, see NodeId in .NET Reference.
            
DISPID (Dispatch ID):
For more information, see NodeId in .NET Reference.
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Public Property NodeId As String  | 
See NodeId in .NET Reference.
For remarks, see NodeId in .NET Reference.
For examples, see NodeId in .NET Reference.