/// <summary>
/// Sends a message stanza to the server.
/// </summary>
/// <param name="xmpp">XMPP connection to use</param>
/// <param name="to">JID of the intended recipient</param>
/// <param name="body">Human-readable textual contents of the message</param>
public static void SendMessage(this XmppConnection xmpp, string to, string body)
{
Encode(ref to, ref body);
xmpp.SendCustom($@"
<message type='chat' to='{to}'>
<body>{body}</body>
</message>
");
}
/// <summary>
/// Sends an empty presence stanza.
/// </summary>
/// <param name="xmpp">XMPP connection to use</param>
public static void SendPresence(this XmppConnection xmpp) => xmpp.SendCustom("<presence />");
