Fix MAGN-2317

@lukechurch

This submission takes use of the following commit:
https://github.com/DynamoDS/Dynamo/commit/a567190311f09f4a8c7acab087d27a94783471d6

The submission make some changes to the original code to fix several errors because some code has changed ever since.

This submission fixes magn-2317.
This line will only be executed once, that is, only when the node is found. If this line is moved outside of this foreach loop, then it will be really unnecessarily executed for many times.