private string CreateApiSignature(string url, List <KeyValuePair <string, string> > values)
{
string prefixRequest = PrefixRequest(url);
string suffixRequest = "";
IEnumerable <KeyValuePair <string, string> > ordered =
values.Where(x => x.Key.CompareTo("SymbolList") < 0).OrderBy(x => x.Key)
.Concat(values.Where(x => x.Key.StartsWith("SymbolList")))
.Concat(values.Where(x => !x.Key.StartsWith("SymbolList") && x.Key.CompareTo("SymbolList") > 0).OrderBy(x => x.Key));
foreach (KeyValuePair <string, string> el in ordered)
{
suffixRequest += suffixRequest.Length > 1 ? WebUtility.UrlEncode("&" + WebUtility.UrlEncode(el.Key) + "=" + WebUtility.UrlEncode(el.Value)) : WebUtility.UrlEncode(WebUtility.UrlEncode(el.Key) + "=" + WebUtility.UrlEncode(el.Value));
}
return(UrlUtilities.CreateToken(prefixRequest + suffixRequest, _apiConfiguration.Secret));
}