using LinqToDB.Mapping; using System; namespace SeniorAssistant.Models { public class Notification : IHasTime { [Column(IsPrimaryKey = true, CanBeNull = false, IsIdentity = true)] public int Id { get; set; } [NotNull] public string Username { get; set; } [NotNull] public DateTime Time { get; set; } public bool Seen { get; set; } public string Message { get; set; } } }