thanks,%XML.TextReader could read the xml,but what i want to know is, xml 2 obj and i can reset some element`s value ,and then output the xml with new data

<?xml version="1.0" encoding="UTF-8"?>
<ClinicalDocument xmlns="urn:hl7-org:v3" xmlns:mif="urn:hl7-org:v3/mif" xmlns:xsi="" xsi:schemaLocation="urn:hl7-org:v3 ../sdschemas/SDA.xsd" classCode="DOCCLIN" moodCode="EVN">
  <value xsi:type="ST">xxxx</value>

it seems very complex,so far,i would like to use webservice 

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