File Naming

My solution:

string[] fileNaming(string[] names)
{
    var list = new List<string>();
    foreach (var name in names)
        if (!list.Contains(name))
            list.Add(name);
        else
            for (var i = 1; i < 16; i++)
            {
                if (list.Contains(name + "(" + i + ")")) continue;
                list.Add(name + "(" + i + ")");
                break;
            }

    return list.ToArray();
}

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