解析带命名空间的xml文件

void Doc()
{
            XmlDocument doc = new XmlDocument();
            doc.Load(AppDomain.CurrentDomain.BaseDirectory + "File.xml");
            XmlNode node = doc.DocumentElement;

            //加入命名空间
            NameTable nt = new NameTable();
            XmlNamespaceManager nsmgr = new XmlNamespaceManager(nt);
            nsmgr.AddNamespace("cim", "http://ns.zhaopin.com/resumes");

            XmlNodeList xnl = node.SelectSingleNode("//cim:Resume", nsmgr).ChildNodes;
            StringBuilder sb = new StringBuilder();
            int i = 0;
            foreach (XmlNode item inxnl)

<?xml version="1.0" encoding="utf-8"?>
<cim:Resume xmlns:cim="http://ns.zhaopin.com/resumes" xmlns:rdf="a">
  <cim:Breaker rdf:ID="_Breaker_abc5011" >
    <cim:Naming.aliasName>abc5011</cim:Naming.aliasName>
    <cim:Naming.name>abc5011</cim:Naming.name>
    <cim:Switch.normalOpen>1</cim:Switch.normalOpen>
    <cim:Breaker.ampRating>0.0000</cim:Breaker.ampRating>
    <cim:Equipment.MemberOf_EquipmentContainer rdf:resource="#_VoltageLevel_abc500"/>
    <cim:ConductingEquipment.Terminals rdf:resource="#_Terminal_cb1_T1"/>
    <cim:ConductingEquipment.Terminals rdf:resource="#_Terminal_cb1_T2"/>
  </cim:Breaker>
  <cim:BusbarSection rdf:ID="_BusbarSection_abc5b1">
    <cim:Naming.aliasName>二电厂1母</cim:Naming.aliasName>
    <cim:Naming.name>abc5b1</cim:Naming.name>
    <cim:Equipment.MemberOf_EquipmentContainer rdf:resource="#_VoltageLevel_abc500"/>
    <cim:ConductingEquipment.Terminals rdf:resource="#_Terminal_bus1_T1"/>
  </cim:BusbarSection>
</cim:Resume>