title: Query issue on XmlReader with namespace alias/prefix
body: <p>Trying to query XML with C# trough XmlReader but gets error cause namespace alias. The XML file is very large (&lt;1,6GB) and alias and namespace can vary from file to file.</p>
  
  <p>In the example below Im trying find the "MsgHead" tag but since there are a alias (&lt;*<em>mh:</em>*MsgHead>) the query do not detect the tag. Since namespace and alias vary its not option to hard code alias and namespace.</p>
  
  <p>Is there any option to ignore namespace alias?</p>
  
  <p>XML:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="ISO-8859-1"?&gt;
  &lt;mh:MsgHead xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
          xmlns:mh="http://www.kith.no/xmlstds/msghead/2006-05-24"
          xmlns:n1="http://www.altova.com/samplexml/other-namespace"
          xsi:schemaLocation="http://www.kith.no/xmlstds/msghead/2006-05-24 MsgHead-v1_2.xsd"&gt;
   &lt;mh:MsgInfo&gt;
    &lt;mh:Type DN="xxx" V="xxx"/&gt;
    &lt;mh:MIGversion&gt;v1.2 2006-05-24&lt;/mh:MIGversion&gt;
    &lt;mh:GenDate&gt;2014-04-01T20:53:08&lt;/mh:GenDate&gt;
    &lt;mh:MsgId&gt;xxx&lt;/mh:MsgId&gt;
    &lt;mh:ProcessingStatus DN="Produksjon" V="P"/&gt;
    &lt;mh:RequestedPriority DN="Normal" V="N"/&gt;
    &lt;mh:Ack DN="Ja" V="J"/&gt;
    &lt;mh:Sender&gt;
     &lt;mh:ComMethod DN="EDI" V="EDI"/&gt;
     &lt;mh:Organisation&gt;
  &lt;mh:OrganisationName&gt;xxxx&lt;/mh:OrganisationName&gt;
  &lt;mh:Ident&gt;
   &lt;mh:Id&gt;69&lt;/mh:Id&gt;
   &lt;mh:TypeId S="xxx" DN="HER-id" V="HER"/&gt;
  </code></pre>
  
  <p>C# code:</p>
  
  <pre><code>string meldingsType = "N/A";
  XmlReaderSettings settings = new XmlReaderSettings();
  settings.CheckCharacters = false;
  XmlReader xmlLeser = XmlReader.Create(fil, settings);
  while (xmlLeser.Read())
  {
      if ((xmlLeser.NodeType == XmlNodeType.Element) &amp;&amp; (xmlLeser.Name == "MsgHead"))
      {
         meldingsType = "Hodemelding";
         break;
      }
  </code></pre>