Consume Web service using SoapClient

Hi All,

I need to consume Soap web service in my C# application using SoapClient, 

Kindly suggest me how do I pass all these parameters in my App.

Thanks

<OTA_ReadRQ PrimaryLangID="en" Version="0"><POS><Source AgentDutyCode="XXXX"><RequestorID Type="XX" MessagePassword="XXXX"/></Source></POS><ReadRequests><ReadRequest><UniqueID ID="XXXX"/></ReadRequest></ReadRequests></OTA_ReadRQ>