hashtable not recognized?

[comingme]

Could anyone help me solve this problem?
I can define hashtable but not hashset. It gives comiling error.

Thanks very much for your help.

[NinjaTrader_Bertrand]

Welcome to the forums! Did you add to use System.Collections in the declaration section of your script? http://msdn.microsoft.com/en-us/libr...s.generic.aspx