C# DataAnnotations

/// <summary>

/// Token class

/// </summary>

[Index(nameof(AccessToken), IsUnique = true, Name = "Uk_DataModel_AccessToken")]

[Index(nameof(Status), Name = "Ix_DataModel_Status")]

[Index("Descripcion", Name = "UK_DataModel_Descripcion", IsUnique = true)]

public class DataModel

{

    /// <summary>

    /// Defgult constructor

    /// </summary>

    public DataModel()

    {

        UsernameChangeLimit = 10;

        Id = Guid.NewGuid();

        CreatedDate = DateTimeOffset.UtcNow.AddHours(-5);

        Status = Status.Active;

        ProfilePicture = Convert.FromBase64String("iVBORw0KGgo...");

    }

    /// <summary>

    /// Expire Minutes property

    /// </summary>

    [Required]

    [Range(1, 1440)]

    public int ExpireMinutes { get; set; }

    /// <summary>

    /// Symmetric Security Key property

    /// </summary>

    [Required]

    [ProtectedPersonalData]

    public string SymmetricSecurityKey { get; set; }

    /// <summary>

    /// Id property

    /// </summary>

    [Key]

    [Required]

    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]

    public int Id { get; set; }

    /// <summary>

    /// Profile Picture

    /// </summary>

    [Comment("ProfilePicture")]

    [Display(Name = "Imagen usuario")]

    [Required(ErrorMessage = "{0} requerido")]

    public byte[] ProfilePicture { get; set; }

    /// <summary>

    /// First Name

    /// </summary>

    [PersonalData]

    [Comment("Nombre")]

    [Display(Name = "Nombre")]

    [Required(ErrorMessage = "{0} requerido")]

    [StringLength(50)]

    [MinLength(3, ErrorMessage = "{0} mínimo {1} caracteres")]

    [MaxLength(50, ErrorMessage = "{0} máximo {1} caracteres")]

    public string FirstName { get; set; }

    /// <summary>

    /// Username Change Limit

    /// </summary>

    [Comment("UsernameChangeLimit")]

    [Display(Name = "Límite cambio usuario")]

    [Range(1, 20, ErrorMessage = "{0} rango entre {1} y {2}")]

    public int UsernameChangeLimit { get; set; }

    /// <summary>

    /// Created Date property

    /// </summary>

    [Comment("CreatedDate")]

    [Display(Name = "Fecha creación")]

    [Required(ErrorMessage = "{0} requerido")]

    [DataType(DataType.DateTime, ErrorMessage = "{0} formato fecha incorrecto")]

    public DateTimeOffset CreatedDate { get; set; }

    /// <summary>

    /// Descripcion

    /// </summary>

    public string Descripcion { get; set; }

    [Comment("Price")]

    [Display(Name = "Precio")]

    [Range(0.1, 999999999, ErrorMessage = "{0} rango entre {1} y {2}")]

    public decimal Precio { get; set; }

}