public int GetPrice()
{
if (packs[2] is CDiscountPack || packs[3] is IDiscountPack)
{
CDiscountPack cpack = packs[2] as CDiscountPack;
DDiscountPack dpack = packs[3] as DDiscountPack;
if ((cpack != null && dpack != null) && ((cpack.ProductsCount > 0 && dpack.ProductsCount > 0) && (cpack.ProductsCount % dpack.ProductsCount) == 0))
{
cpack.Price = 15;
dpack.Price = 15;
}
}
return(packs.Sum(p => p.GetPrice()));
}
public void AddProduct(Product p)
{
if (p.Id == "A")
{
ADiscountPack apack = packs[0] as ADiscountPack;
if (apack != null)
{
apack.ProductsCount++;
}
}
else if (p.Id == "B")
{
BDiscountPack apack = packs[1] as BDiscountPack;
if (apack != null)
{
apack.ProductsCount++;
}
}
else if (p.Id == "C")
{
CDiscountPack apack = packs[2] as CDiscountPack;
if (apack != null)
{
apack.ProductsCount++;
}
}
else if (p.Id == "D")
{
DDiscountPack apack = packs[3] as DDiscountPack;
if (apack != null)
{
apack.ProductsCount++;
}
}
}