private static void PrintWhenRmoved <OrderItem>(object sender, ModifyElementEventArgs <OrderItem> e)
{
Console.WriteLine($"Element {e.Item} was deleted");
}
protected virtual void OnOrderItemRemoved(object sender, ModifyElementEventArgs <T> e)
{
OrderItemRemoved?.Invoke(this, e);
}
private static void PrintWhenAdded <OrderItem>(object sender, ModifyElementEventArgs <OrderItem> e)
{
Console.WriteLine($"Element {e.Item} was added to collection");
}