using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace MqttMsgServer.Model { public interface IEntity { T Id { get; set; } } public class Entity : IEntity { public T Id { get; set; } } public class CreatorEntity : Entity { public DateTime CreatorDate { get; set; } public int CreatorUserId { get; set; } } }