<appSettings>      <add key="BizAssembly" value="PSMS.Biz"/>  </appSettings> 

/// <summary>      /// 完成从客户端获取远程业务逻辑对象的代理      /// </summary>      public static class FacadeService      {          static IDictionary<string, Type> serviceClassCatalog;//定义一个键值对接口对象          static FacadeService()          {              serviceClassCatalog = new Dictionary<string, Type>();              Assembly assembly = Assembly.Load(new AssemblyName(ConfigurationManager.AppSettings["BizAssembly"]));//开始加载程序集对象              Type[] types = assembly.GetExportedTypes();//获取程序集中所有对象的类型集合              Type baseType = typeof(MarshalByRefObject);              foreach (Type type in types)              {                  if (baseType.IsAssignableFrom(type))                  {                      Type[] interfaces = type.GetInterfaces();                      //此处登记的是接口类型最终派生的接口类型，即最高层接口                      if (interfaces.Length > 0)                      {                          serviceClassCatalog.Add(interfaces[0].FullName, type);                      }                  }              }          }          /// <summary>          /// 根据传入的业务逻辑类的接口类型，返回实现该接口的类型对象实例远程代理          /// </summary>          /// <typeparam name="IFacade">具体的业务逻辑接口类型</typeparam>          /// <returns>实现该接口的类型对象实例远程代理</returns>          public static IFacade GetFacade<IFacade>()          {              string typeName = typeof(IFacade).FullName;              if (serviceClassCatalog.ContainsKey(typeName))              {                  object realProxy = Activator.CreateInstance(serviceClassCatalog[typeName]);                  return (IFacade)realProxy;              }              else              {                  throw new Exception("未包含接口所定义的服务类型。");              }          }      } 

public partial class MyTest: System.Web.UI.Page  {     //在后台代码中构建一个（测试用的）接口的实例对象      static IUserInfoFacade userInfoFacade = FacadeService.GetFacade<IUserInfoFacade>();     //其它功能实现代码     //......     //......     private void Method1()     {         //具体的调用         List<UserInfo> lstUserInfo = userInfoFacade.GetUserInfoList(unitCode, 0, 0);         //其它功能实现代码          //......         //......     }  }