public  class EMMPBaseMsg    {               public String Data { get; set; }            public DateTime AddTime { get; set; }             public long Id { get; set; }               public String HandleType { get; set; }    }     public class EMMPResponse    {         public EMMPResponse()         {             Model = new List
     
      ();         }         public int Code { get; set; }         public String Msg { get; set; }         public List
      
        Model         {             get;             set;         }    }     public class EMMPResponse    {         public EMMPResponse()         {             Model = new List
       
        ();         }         public int Code { get; set; }         public String Msg { get; set; }                public List
        
          Model         {             get;             set;         }    }
        
       
      
     

将上面EMMPResponse的 List<EMMPResponseMsg>改成 //将List<EMMPBaseMsg>后

用户调用WCF接口时返回的response中，

response.Model.Add(new EMMPResponseMsg(){}); 时 会报服务错误，基础链接被关闭

但是调试wcf接口实现代码时是正确的，因为错误发生在WCF基础框架序列化时

解决，就是按声明的类型往Model集合里添加该类型数据