public void IssueToMember(patron member)
{
this.Borrower = member;
this.patronid = member.id;
this.due_date = DateTime.Today.AddDays(BusinessRules.ItemRenewPeriodInDay);
this.status = (int)item_status.StatusEnum.Out;
}
public void Return()
{
this.Borrower = null;
this.patronid = null;
this.due_date = null;
this.status = (int)item_status.StatusEnum.In;
}