Entity Framework Timestamp Data Annotation

The TimeStamp attribute is used to create a column with timestamp data type in the SQL Server database.

• EF Code First will treat Timestamp properties the same as ConcurrencyCheck properties.
• It can only be applied once in an entity class to a byte array type property.
• It will also ensure that the database field that Code First generates is non-nullable.
• Entity Framework API automatically uses this Timestamp column in concurrency check on the UPDATE statement in the database.

In the following example, the Timestamp attribute is applied to the RowVersion property which is a byte array.

public class Book
{
    public int BookId { get; set; }
    public string Title { get; set; }
    [Timestamp]
    public byte[] RowVersion { get; set; }
}

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