How to find the tag with in XML string using ASP.NET with C#?

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I want to find the tag with in Xml string using asp.net with c#. I am getting the exception as below:
'http' is an unexpected token. Expecting white space. Line 1, position 216

My Xml is as below:

<ns5:Envelope xmlns:ns5="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns2="http://www.temenos.com/T24/ofs/Response" xmlns:ns3="https://soa.nbf.ae/Enquiry/" xmlns:ns6="http://www.w3.org/2001/XMLSchema xmlns:ns4="http://www.temenos.com/T24/ofs/ResponseCommon" xmlns:ns1="http://www.temenos.com/T24/ofs/NBFDDSLOANLOOKUPType xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

   <ns5:Body>
 
       <ns3:T24EnquiryResponse>
  
           <Status> SUCCESS </Status>
  
           <EnquiryOutput>
  
              <NBFDDSLOANLOOKUP xmlns: ns0 = "http://www.temenos.com/T24/ofs/Response">
    
                   <gNBFDDSLOANLOOKUPDetailType>
    
                      <mNBFDDSLOANLOOKUPDetailType>
    
                         <ID> LD1930900010 </ID>
    
                         <CUSTOMERID> 575557 </CUSTOMERID>
    
                         <PRINLIQACCT> 012001447996 </PRINLIQACCT>
    
                         <DRAWDOWNACCOUNT> 012001447996 </DRAWDOWNACCOUNT>
    
                         <CURRENCY> AED </CURRENCY>
    
                         <AMOUNT> 14855.35 </AMOUNT>
    
                      </mNBFDDSLOANLOOKUPDetailType>
    
                   </gNBFDDSLOANLOOKUPDetailType>
    
                </NBFDDSLOANLOOKUP>
    
             </EnquiryOutput>
    
          </ns3:T24EnquiryResponse>
     
        </ns5:Body>

What I have tried:

Code is as below:

XmlDocument doc = new XmlDocument();
               XDocument xdoc = new XDocument();
               doc.LoadXml(ResponseAPI);


               XmlNodeList nodeList = doc.GetElementsByTagName("gNBFDDSLOANLOOKUPDetailType");

               foreach (XmlNode node in nodeList)
               {
                   isTest = true;

               }