public class ResultModel

{

   public string PlateNumber { get; set; }

   public int PlateColor { get; set; }

}

 public class VehicleModel

{

   public string lp { get; set; }

   public int lpColor { get; set; }

   public static explicit operator ResultModel(VehicleModel v)

   {

      ResultModel r = new ResultModel();

      r.PlateNumber = v.lp;

      r.PlateColor = (int)v.lpColor;

   }

   public static IList<ResultModel> ToResultModelLst(IList<VehicleModel> lst)

   {

      IList<ResultModel> ret = new List<ResultModel>();

      foreach (var item in lst)

          ret.Add((ResultModel)item);  //强制类型转换

      return ret;

      }

}