var dm = new DiscoManager(con);
dm.DiscoverInformation("<room>@conference.<myserver>.com", new IqCB(OnIqReturn));

<?xml version="1.0" encoding="utf-8" ?>
<iq xmlns="jabber:client" type="result" id="agsXMPP_5">
  <query xmlns="http://jabber.org/protocol/disco#info">
    <identity type="text" name="room_" category="conference" />
    <feature var="http://jabber.org/protocol/muc" />
    <feature var="muc_public" />
    <feature var="muc_open" />
    <feature var="muc_unmoderated" />
    <feature var="muc_nonanonymous" />
    <feature var="muc_unsecured" />
    <feature var="muc_temporary" />
    <feature var="http://jabber.org/protocol/disco#info" />
    <x xmlns="jabber:x:data" type="result">
      <field type="hidden" var="FORM_TYPE">
        <value>http://jabber.org/protocol/muc#roominfo</value>
      </field>
      <field var="muc#roominfo_description" label="Description">
        <value>room_</value>
      </field>
      <field var="muc#roominfo_occupants" label="Number of occupants">
        <value />
        <value>8</value>
      </field>
      <field var="x-muc#roominfo_creationdate" label="Creation date">
        <value>20130325T10:11:26</value>
      </field>
    </x>
  </query>
</iq>