1 public class ReturnModelBase 2 { 3     public bool State { get; set; } 4     public string Message { get; set; } 5 } 6 public class ReturnModel : ReturnModelBase 7 { 8     public object Data { get; set; } 9 }10 public class ReturnModel
     
       : ReturnModelBase11 {12     public T Data { get; set; }13 }14 public class ReturnModelList
      
        : ReturnModelBase15 {16     public List
       
         Data { get; set; }17 }