String.Split() Function mysteriously ignoring duplicates

Question

In Unity3D I am reading a textfile with information on nodes and its connections.

However it seems that ALL duplicates are removed automatically!

Answer 1

This is an infamous gotchya in Unity:

very simply, in the Unity console:

IT DOES NOT PRINT DUPLICATES!!!

Look more carefully by the console output, and there's a Collapse toggle that makes it show or not show duplicates.

It's that simple.