Why “Data at the root level is invalid. Line 1, position 1.” for XML Document?
I eventually figured out there was a byte mark exception and removed it using this code: string _byteOrderMarkUtf8 = Encoding.UTF8.GetString(Encoding.UTF8.GetPreamble()); if (xml.StartsWith(_byteOrderMarkUtf8)) { var lastIndexOfUtf8 = _byteOrderMarkUtf8.Length-1; xml = xml.Remove(0, lastIndexOfUtf8); }