using System; using System.ComponentModel.DataAnnotations; namespace Rdh.ElectronicMedicineKit.Models { public interface IEntity { T Id { get; set; } } public abstract class RootEntity : IEntity { [Key] public Guid Id { get; set; } = Guid.NewGuid(); public Guid? Creator { get; set; } public DateTime CreationTime { get; set; } public Guid? Modifier { get; set; } public DateTime? LastModificationTime { get; set; } public bool IsDeleted { get; set; } public DateTime? DeletionTime { get; set; } } }