private static async Task<IValueProvider> CreateValueProviderAsync(HttpRequest request)
 {
     return new FormValueProvider(
         BindingSource.Form,
         await request.ReadFormAsync(),
         CultureInfo.CurrentCulture);
 }
        private static async Task<IDictionary<string, StringValues>> GetValueCollectionAsync(HttpRequest request)
        {
            var formCollection = await request.ReadFormAsync();

            var dictionary = new Dictionary<string, StringValues>(StringComparer.OrdinalIgnoreCase);
            foreach (var entry in formCollection)
            {
                var key = NormalizeJQueryToMvc(entry.Key);
                dictionary[key] = entry.Value;
            }

            return dictionary;
        }