когда делаю migrations выдаёт ошибку: The entity type 'Person' requires a primary key to be defined

когда делаю migrations выдаёт ошибку:

The entity type 'Person' requires a primary key to be defined.

Мой код:

public class Person
{
    public int CustomerID { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public int Order_Product { get; set; }
}
public class Information
{
    public int OrderID { get; set; }
    public int CustomerID { get; set; }
    public string Title { get; set; }
    public byte[] Photo { get; set; }
    public string Text { get; set; }
}
using Microsoft.EntityFrameworkCore;
public class VideoGamesDatabaseContext : DbContext
{
    public DbSet<Person> Persons {get; set;}
    public DbSet<Information> Informations {get; set;}
    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseSqlServer("Server=localhost,2727; Database=Persons; User=sa; Password=Pa$$word1");
    }
}