从外部Web服务捕获xml通过节点解析

Question

我有一个c＃web应用程序，它有一个简单的任务：使用外部Web服务，并循环返回其返回的xml。

我正在使用这样的网络服务：

 WSExternal.SoapHeaderCredentials objHeaderCredentials = new WSExternal.SoapHeaderCredentials();
        objHeaderCredentials.UserName = "username";
        objHeaderCredentials.Password = "password";
        WSExternal.MembershipAuthenticationService objClient = new WSExternal.MembershipAuthenticationService();
        objClient.SoapHeaderCredentialsValue = objHeaderCredentials;

我可以像这样调用单个公开的Web方法：

objClient.GetMembershipUserList(false);

如果我通过像SoapUI或XMLSpy这样的客户端访问Web服务，它会像这样返回xml：

<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">


  <soap:Body>
      <GetMembershipUserListResponse xmlns="http://namespaceofwebservice">
         <GetMembershipUserListResult>
            <UserList>
               <MembershipUserData>
                  <id>1</id>
                  <UserName>userone</UserName>
                  <PrimaryFirstName>User</PrimaryFirstName>
                  <PrimaryLastName>One</PrimaryLastName>
                  <Address>13 MAIN STREET</Address>
                  <City>ROCHESTER</City>
               </MembershipUserData>
               <MembershipUserData>
                  <id>2</id>
                  <UserName>usertwo</UserName>
                  <PrimaryFirstName>User</PrimaryFirstName>
                  <PrimaryLastName>Two</PrimaryLastName>
                  <Address>15 WEST AVE</Address>
                  <City>JERSEY CITY</City>
               </MembershipUserData>
            </UserList>
            <Page>0</Page>
         </GetMembershipUserListResult>
      </GetMembershipUserListResponse>
   </soap:Body>

我的问题是，我如何从Web方法“捕获”这个xml，并循环它以从节点中获取相关数据？