System.Net.WebClient.DownloadData C# (CSharp) Method

        public byte[] DownloadData(System.Uri address) { throw null; }
        public void DownloadDataAsync(System.Uri address) { }

        public decimal GetConvertion(string from, string to)
        {
            WebClient objWebClient = null;
            UTF8Encoding objUTF8 = null;
            decimal result = 0;

            try{
                objWebClient = new WebClient();
                objUTF8 = new UTF8Encoding();

                byte[] aRequestedHTML = objWebClient.DownloadData(String.Format("http://www.xe.com/ucc/convert/?Amount=1&From={0}&To={1}", from, to));
                string strRequestedHTML = objUTF8.GetString(aRequestedHTML);

                int search1 = strRequestedHTML.LastIndexOf("&nbsp;<span class=\"uccResCde\">USD</span>");
                string search2 = strRequestedHTML.Substring(search1 - 21, 21);
                int search3 = search2.LastIndexOf(">");
                string stringRepresentingCE = search2.Substring(search3 + 1);

                result = Convert.ToDecimal(stringRepresentingCE.Trim());

            }
            catch (Exception ex){
                // Agregar codigo para manejar la excepción.
            }

            return result;
        }