public RetailItem GetItem(string deptName, string itemName)
{
Verify.NotNullOrEmpty(deptName, nameof(deptName));
Verify.NotNullOrEmpty(itemName, nameof(itemName));
RetailDepartment dept = Departments.FirstOrDefault(o => o.Name.Equals(deptName, StringComparison.OrdinalIgnoreCase));
VerifyFound("Department", dept);
RetailItem item = dept.Items.FirstOrDefault(o => o.Name.Equals(itemName, StringComparison.OrdinalIgnoreCase));
VerifyFound("Item", item);
if (item.UnitPrice < 0)
{
throw new InvalidPriceException(item);
}
return(item);
}
internal void AddItem(string name, decimal unitPrice)
{
var newItem = new RetailItem(name, unitPrice);
Items.Add(newItem);
}