public string Add(Product aProduct)
{
if (HasThisProduct(aProduct.ProductId))
{
UpdateProduct(aProduct);
}
Products.Add(aProduct);
return "Product Added";
}
private void UpdateProduct(Product aProduct)
{
foreach (var product in Products)
{
if (aProduct.ProductId == product.ProductId)
{
product.ProductQuantity += aProduct.ProductQuantity;
}
}
}
