C#前台调用接口

Question

经理发给我一个xml格式的文件；说传递3个参数，让我在前台调用，xml格式如下：<?xml version="1.0" encoding="GB2312" standalone="yes" ?>- <BKRequest xmlns="http://composite.bk.iv.soa.sxmcc.com">- <Header xmlns=" ">  <JMSMessageID />  <TransactionID>TransactionID</TransactionID>  <ServiceName>SHW_QueryProd</ServiceName>  <ServiceConsumer>USSP</ServiceConsumer>- <ServiceProviderList>- <ServiceProvider>  <Name>BOSS</Name>  <Order>1</Order>  <Priority>1</Priority>  <ServiceName>SHW_QueryProd</ServiceName>  </ServiceProvider>  </ServiceProviderList>  <PhoneNo>13734030009</PhoneNo>  </Header>- <BookedServiceCheckReq xmlns=" ">  <BizCode>tfc0</BizCode>  <BizFlag>00</BizFlag>  </BookedServiceCheckReq>  </BKRequest> 请问我该怎样做，给出一个大体的步骤，多谢