Entity Framework Required Data Annotation

The Required attribute can be applied to a property to make it a required property in an entity class.

• EF will create a NOT NULL column in a database table for a property on which the Required attribute is applied.
• If you save an entity without assigning a value to the Required property, then EF 6 will throw the System.Data.Entity.Validation.DbEntityValidationException exception.

public class Book
{
    public int BookId { get; set; }
    [Required]
    public string Title { get; set; }
}

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