Eu usei o código cs de preferências de serviço da web. Eu tenho uma solicitação de serviço da web xml soap.

 <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
    <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <List xmlns="http://ws.ddd.com/" wsNo="451" member="XYZ">
    <dateStart xmlns="">20180708</dateStart>
    <dateFinish xmlns="">20180708</dateFinish>
    <typeX xmlns="">0</type>
    </List>
    </s:Body>
    </s:Envelope>

Mas eu quero mudar isso, como eu faço isso c #? Obrigado.

<s:Envelope
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:a="http://ws.ddd.com/">
<a:List member="XYZ" wsNo="451">
<dateStart>20180708</dateStart>
<dateFinish>20180708</dateFinish>
<typeX >0</type>
</a:List> 
</s:Body>
</s:Envelope>