C
C#•2mo ago
Yarden

✅ I need help with explanation of given entity attributes

Updated the post I've got recommended to add 3 attributes to my Entity: 
        [Timestamp]
        public byte[] RowVersion { get; set; }
        public DateTime CreatedAtUtc { get; set; }
        public DateTime ModifiedAtUtc { get; set; }
        [Timestamp]
        public byte[] RowVersion { get; set; }
        public DateTime CreatedAtUtc { get; set; }
        public DateTime ModifiedAtUtc { get; set; }
cs This is my current Entity class: 
[Index(nameof(UserName), IsUnique = true)]
[Index(nameof(Email), IsUnique = true)]
public class UserEntity
{

    [Timestamp]
    public byte[] RowVersion { get; set; }
    public DateTime CreatedAtUtc { get; set; }
    public DateTime ModifiedAtUtc { get; set; }

    [Key] public int Id { get; set; }

    [Required, MaxLength(30)]
    [RegularExpression ("^[a-zA-Z0-9]+$")]                                                              //User name should not contain special characters
    public string UserName { get; set; } = default!;

    [Required, MaxLength(254), EmailAddress]
    public string Email { get; set; } = default!;

    ... More  attribut...
[Index(nameof(UserName), IsUnique = true)]
[Index(nameof(Email), IsUnique = true)]
public class UserEntity
{

    [Timestamp]
    public byte[] RowVersion { get; set; }
    public DateTime CreatedAtUtc { get; set; }
    public DateTime ModifiedAtUtc { get; set; }

    [Key] public int Id { get; set; }

    [Required, MaxLength(30)]
    [RegularExpression ("^[a-zA-Z0-9]+$")]                                                              //User name should not contain special characters
    public string UserName { get; set; } = default!;

    [Required, MaxLength(254), EmailAddress]
    public string Email { get; set; } = default!;

    ... More  attribut...
cs What is the problem? I guess I understood the purpose of CreatedAtUtc and ModifiedAtUtc. But RowVersion I still don't understand. I don't understand what exactly the purpose and how I suppose to manage this.
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