How to convert linq results to HashSet or HashedSet

Question

I have a property on a class that is an ISet. I\'m trying to get the results of a linq query into that property, but can\'t figure out how to do so.

Basically, look

Answer 1

If you need just readonly access to the set and the source is a parameter to your method, then I would go with

public static ISet EnsureSet(this IEnumerable source)
{
    ISet result = source as ISet;
    if (result != null)
        return result;
    return new HashSet(source);
}

The reason is, that the users may call your method with the ISet already so you do not need to create the copy.