>Thanks. To turn the logic around a bit. How would I refer to the nth credential in the list of credentials?
>
>credentials[n]
>
You should decide early on if you need a named or positional access and use a dict/hashmap or array based data structure. Dunno if Dotnet has an ordered dict as a base type, but if not I am sure there are OS implementations - but as they are hybrid they show perhaps not best speed, so go this road only if you REALLY need both types of access...