|
using System;
namespace CaseStudy
{
public class Invoice
{
private string number;
private Vendor vendor;
private ChargesArray charges;
public string Number
{
get {return number;}
set {number=value;}
}
public Vendor Vendor
{
get {return vendor;}
set
{
if (value==null)
{
throw(new InvalidVendorException());
}
vendor=value;
}
}
public int ChargeCount
{
get {return charges.Count;}
}
public ChargesArray Charges
{
get {return charges;}
}
public Invoice()
{
charges=new ChargesArray();
number="";
vendor=null;
}
public void Add(Charge c)
{
if (c==null)
{
throw(new InvalidChargeException());
}
if (c.Description=="")
{
throw(new UnassignedChargeException());
}
charges.Add(c);
}
}
}
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