namespace Xmpp.Xep.MessageProcessingHints { private const string NS_URI = "urn:xmpp:hints"; private const string HINT_NO_PERMANENT_STORE = "no-permanent-store"; private const string HINT_NO_STORE = "no-store"; private const string HINT_NO_COPY = "no-copy"; private const string HINT_STORE = "store"; public static void set_message_hint(MessageStanza message, string message_hint) { StanzaNode hint_node = (new StanzaNode.build(message_hint, NS_URI)).add_self_xmlns(); message.stanza.put_node(hint_node); } }