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

Here is the HashSet approach:

public static string[] RemoveDuplicates(string[] s)
{
    HashSet set = new HashSet(s);
    string[] result = new string[set.Count];
    set.CopyTo(result);
    return result;
}

Unfortunately this solution also requires .NET framework 3.5 or later as HashSet was not added until that version. You could also use array.Distinct(), which is a feature of LINQ.