Check constructor arguments when calling Activator.CreateInstance

[JohanLarsson]

return (EqualByComparer)Activator.CreateInstance(
    typeof(ReadOnlyListEqualByComparer<>).MakeGenericType(itemType),
    settings.GetEqualByComparer(itemType),
    ↓typeof(int));

Should warn there as:

    internal class ReadOnlyListEqualByComparer<T> : EqualByComparer
    {
        private readonly EqualByComparer<T> comparer;

        public ReadOnlyListEqualByComparer(EqualByComparer<T> comparer)
        {
            this.comparer = comparer;
        }