public IActionResult Task4Result(
            [ModelBinder(typeof(IntArrayModelBinder))] IEnumerable <int> firstCollection,
            [ModelBinder(typeof(IntArrayModelBinder))] IEnumerable <int> secondCollection)
        {
            var numProcessor = new NumericCollectionsProcessor();
            var result       = numProcessor.GetIntersectionsAndSquares(firstCollection, secondCollection);

            return(PartialView(result));
        }