Public Class Order

    Public Property OrderID As Integer

    Public Property Customer As Customer

    Public Property OrderDetails As List(Of OrderDetails)  '// это корректно ?


   '// Добавление, Редактирование, Удаление заказов в базе - оно должно быть здесь?
    
    Public Sub Add()

    End Sub

    Public Sub Edit()

    End Sub

    Public Sub Delete()

    End Sub

End Class

Public Class Orders

    Public Property OrdersList As List(Of Order)  '// это корректно?

    Public Function GetList() As ArrayList  '// получить список заказов с базы - это должно быть здесь?

    End Function

End Class

Public Class OrderDetail

    Public Property Product As Product

    Public Property Quantity As Integer

    Public Property Price As Decimal

End Class

Public Class OrderDetails

    Public Property OrderDetailsList As List(Of OrderDetail)  '// это корректно?

End Class

Public Class Customer

    Public Property CustomerID As Integer

    Public Property CustomerName As String

End Class

Public Class Product

    Public Property ProductID As Integer

    Public Property ProductName As String

End Class

 public class User
{
    public int Id { get; set; }
    public string Name { get; set; }
    public int Age { get; set; }
}


    class UserContext : DbContext
    {
        public UserContext()
            :base("DbConnection")
        { }
          
        public DbSet<User> Users { get; set; }
    }