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

If you needed to sort it, then you could implement a sort that also removes duplicates.

Kills two birds with one stone, then.

Answer 2

You could possibly use a LINQ query to do this:

int[] s = { 1, 2, 3, 3, 4};
int[] q = s.Distinct().ToArray();

Answer 3

Generic Extension method :

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

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