下面的代码如何再继承一个类

[zkj513703929]

    [System.Diagnostics.DebuggerStepThroughAttribute()]
    [System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
    public partial class SystemStatisticsServiceClient : System.ServiceModel.ClientBase<WebApplication1.StatisticsWebService.SystemStatisticsService>,
        WebApplication1.StatisticsWebService.SystemStatisticsService 
{

需要继承的类为：
Microsoft.Web.Services3.WebServicesClientProtocol

[zkj513703929]

    [System.Web.Services.WebServiceBindingAttribute(Name = "ServiceSoap", Namespace = "http://tempuri.org/")]
    public partial class Service : Microsoft.Web.Services3.WebServicesClientProtocol

为什么有的webservice这样生成cs文件，与上面webservice的写法有何不同