void SignStartElement(XmlSigningNodeWriter writer) { int prefixOffset, prefixLength; byte[] prefixBuffer = node.Prefix.GetString(out prefixOffset, out prefixLength); int localNameOffset, localNameLength; byte[] localNameBuffer = node.LocalName.GetString(out localNameOffset, out localNameLength); writer.WriteStartElement(prefixBuffer, prefixOffset, prefixLength, localNameBuffer, localNameOffset, localNameLength); }