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