impossible to access to ArrayList from hashtable ?

Unity Engine
1

hi
i tried to use hastable to access to ArrayList with the following code :

beaconCalculLissageHashtable = new Hashtable();
beaconCalculLissageHashtable[int.Parse(beacon1.name)] = new ArrayList();
((ArrayList)beaconCalculLissageHashtable[beacon1.name]).Add(0.0f); //somme

on last line, i have the error : “object Reference not set to an instance of an object”

thanks for your help

2

sorry … nothing to do with arraylist nor hashtable …
just a stupid error of copy-paste in index ;-(

no more problem