Any containers other than Hashtable and Dictionary use HashCode?

[cjard]

I'm writing a de-dupe algorithm and the existing code uses a Hashtable with the string to dedupe as the key and null as the value.. THe HT is loaded, then a second file being deduped against the first, is iterated and HT.ContainsKey() is called for every line...

HT and Dictionary are "two dimensional" - just wondering if any "one dimensional" container exists for this purpose? SOme kind of list that uses hashing to reduce search time?