public void AddSingleQueryItem(QueryStrings item)
        {
            if (QueryList == null || QueryList.Count == 0)
            {
                QueryList = new List <QueryStrings>();
            }

            QueryList.Add(item);
        }
        public string AddQueryItem(QueryStrings item)
        {
            if (QueryList == null || QueryList.Count == 0)
            {
                QueryList = new List <QueryStrings>();
            }

            QueryList.Add(item);

            return(GenerateQueryString());
        }