Convert string to stream to XML document

// convert string to stream       
XmlDocument xmlDoc = new XmlDocument();    
byte[] byteArray = Encoding.ASCII.GetBytes(xmlResp);
MemoryStream stream = new MemoryStream(byteArray);
xmlDoc = ConvertStreamToXMLDocument(stream);
private XmlDocument ConvertStreamToXMLDocument(Stream stream)
{
    XmlDocument xmlDocument = new XmlDocument();
    xmlDocument = new XmlDocument();
    //load into XDocument
    XDocument xDocument = XDocument.Load(stream);

    //scrub the namespaces out!
    xDocument.Descendants().Attributes().Where(x => x.IsNamespaceDeclaration).Remove();
    // convert to xml document
    using (var xmlReader = xDocument.CreateReader())
    {
        xmlDocument.Load(xmlReader);
    }

    // remove default namespace
    xmlDocument.LoadXml(xmlDocument.OuterXml.Replace(xmlDocument.DocumentElement.NamespaceURI, ""));
    xmlDocument.DocumentElement.RemoveAllAttributes();

    return xmlDocument;
}