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

Generic Extension method :

public static IEnumerable Distinct(this IEnumerable source, IEqualityComparer comparer)
{
    if (source == null)
        throw new ArgumentNullException(nameof(source));

    HashSet set = new HashSet(comparer);
    foreach (TSource item in source)
    {
        if (set.Add(item))
        {
            yield return item;
        }
    }
}