Mvp.Xml.XPointer.XPointerReader.ReadOuterXml C# (CSharp) Method

        public override string ReadOuterXml()
        {
            return _reader.ReadOuterXml();
        }

 public void XPath1SchemeWithoutXmlnsTest() 
 {
     string xptr = "xpath1(m:dsPubs/m:publishers[m:pub_id='1389']/m:pub_name)";            
     XmlReader reader = new XmlTextReader(Globals.GetResource(Globals.PubsNsResource));
     XPointerReader xpr = new XPointerReader(reader, xptr);
     StringBuilder sb = new StringBuilder();
     while (xpr.Read()) {
         sb.Append(xpr.ReadOuterXml());
     }
     string expected = @"<pub_name xmlns=""mvp-xml"">Algodata Infosystems</pub_name><pub_name xmlns=""mvp-xml"">Algodata Infosystems</pub_name><pub_name xmlns=""mvp-xml"">Algodata Infosystems</pub_name><pub_name xmlns=""mvp-xml"">Algodata Infosystems</pub_name><pub_name xmlns=""mvp-xml"">Algodata Infosystems</pub_name>";
     Assert.AreEqual(sb.ToString(), expected);
 }