How do I remove duplicates from a C# array?

Question

I have been working with a string[] array in C# that gets returned from a function call. I could possibly cast to a Generic collection, but I was w

Answer 1

List myStringList = new List();
foreach (string s in myStringArray)
{
    if (!myStringList.Contains(s))
    {
        myStringList.Add(s);
    }
}

This is O(n^2), which won't matter for a short list which is going to be stuffed into a combo, but could be rapidly be a problem on a big collection.