I have a class:

public class Order : BaseEPharmObject
{
    public Order()
    {
    }

    public virtual Guid Id { get; set; }
    public virtual DateTime Created { get; set; }
    public virtual DateTime? Closed { get; set; }
    public virtual OrderResult OrderResult { get; set; }
    public virtual decimal Balance { get; set; }
    public virtual Customer Customer { get; set; }
    public virtual Shift Shift { get; set; }
    public virtual Order LinkedOrder { get; set; }
    public virtual User CreatedBy { get; set; }
    public virtual decimal TotalPayable { get; set; }

    public virtual IList<Transaction> Transactions { get; set; }
    public virtual IList<Payment> Payments { get; set; }
}

I need to clone objects of class Order. How to implement a deep copy right in the base class?