public AssignedPartsViewModel()
{
ScanCommand = new AsyncCommand(Scan);
SearchCommand = new AsyncCommand(Search);
RemoveItemsCommand = new AsyncCommand(RemoveItems);
Items = new ObservableRangeCollection <PartUsage>();
SelectedItems = new ObservableRangeCollection <PartUsage>();
PartKeeper = new PartKeeper();
PartUsageKeeper = new PartUsageKeeper();
}
