How to retrieve actual item from HashSet?

Question

I\'ve read this question about why it is not possible, but haven\'t found a solution to the problem.

I would like to retrieve an item from a .NET HashSet. I

Answer 1

What about overloading the string equality comparer:

  class StringEqualityComparer : IEqualityComparer
{
    public string val1;
    public bool Equals(String s1, String s2)
    {
        if (!s1.Equals(s2)) return false;
        val1 = s1;
        return true;
    }

    public int GetHashCode(String s)
    {
        return s.GetHashCode();
    }
}
public static class HashSetExtension
{
    public static bool TryGetValue(this HashSet hs, string value, out string valout)
    {
        if (hs.Contains(value))
        {
            valout=(hs.Comparer as StringEqualityComparer).val1;
            return true;
        }
        else
        {
            valout = null;
            return false;
        }
    }
}

And then declare the HashSet as:

HashSet hs = new HashSet(new StringEqualityComparer());