ObservableCollection item's property change notifications

[ifgitman]

Hello!

I'm wondering if some feature like this could be done:

class Item
{
   [ObservableProperty]
   public decimal Quantity { get; set; }
   [ObservableProperty]
   public decimal Price { get; set; }
}

class Invoice
{
   [ObservableProperty]
   public ObservableCollection<Item> Items { get; set; }
   
   [ObservableProperty]
   [DependsOn("Items->Quantity")]
   [DependsOn("Items->Price")]
   public decimal Total => Items.Sum(i => i.Quantity * i.Price);
}

It would do for us the work of subscribing to each Item's PropertyChanged event and rising OnPropertyChanged for the calculated property on the "parent" view model.