Correct streaming of XElements

XElementStream.cs

// The code posted at https://blogs.msdn.microsoft.com/xmlteam/2007/03/24/streaming-with-linq-to-xml-part-2/
// will skip every other element with compressed XML.  This occurs because the reader after ReadFrom
// is already positioned on the next node and then the reader.Read() will move it to the node afterwards.
// The logic in this snippet fixes the problem.
internal static IEnumerable<XElement> StreamElements(Stream stream, XName matchName)
{
  using (var reader = XmlReader.Create(stream))
  {
    reader.MoveToContent();
    var continueNoRead = false;
    while (continueNoRead || reader.Read())
    {
      continueNoRead = false;
      switch (reader.NodeType)
      {
        case XmlNodeType.Element:
          if (reader.LocalName == matchName.LocalName
            && ((string.IsNullOrEmpty(reader.NamespaceURI) && string.IsNullOrEmpty(matchName.NamespaceName))
            || reader.NamespaceURI == matchName.NamespaceName))
          {
            var el = XElement.ReadFrom(reader) as XElement;
            if (el != null)
              yield return el;
            continueNoRead = true;
          }
          break;
      }
    }
    reader.Close();
  }
}