Is there a class like a Dictionary without a Value template? Is HashSet<T> the correct answer?

Posted by myotherme on Stack Overflow See other posts from Stack Overflow or by myotherme
Published on 2010-04-28T13:40:19Z Indexed on 2010/04/28 13:43 UTC
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best-practices

I have 3 tables: Foos, Bars and FooBarConfirmations

I want to have a in-memory list of FooBarConfirmations by their hash:

FooID   BarID   Hash
1       1       1_1
2       1       2_1
1       2       1_2
2       2       2_2

What would be the best Class to use to store this type of structure in-memory, so that I can quickly check to see if a combination exists like so:

list.Contains("1_2");

I can do this with Dictionary<string,anything>, but it "feels" wrong.

HashSet looks like the right tool for the job, but does it use some form of hashing algorithm in the background to do the lookups efficiently?

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