WPF

<ScrollViewer x:Name="Scroller" Grid.Row="2" Margin="0,0">
    <StackPanel>
        <ItemsControl x:Name="containers"
            ItemsSource="{Binding Whatever, NotifyOnTargetUpdated=True}"
            TargetUpdated="Containers_OnTargetUpdated">
        </ItemsControl>
    <StackPanel>
<ScrollViewer>

public partial class MyPage: UserControl
{
    public MyPage()
    {
        InitializeComponent();
    }

    private void Containers_OnTargetUpdated(object? Sender, DataTransferEventArgs E)
    {
        var MyScroller = (ScrollViewer) this.FindName("Scroller");
        MyScroller.ScrollToHome();
    }
}

<TextBox Grid.Column="5" 
            Text="{Binding Entity.InvoiceAmount, StringFormat=C, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
            Margin="2"
            Width="200"
            Style="{StaticResource textBoxStyle}"
            TextAlignment="Right"
            IsEnabled="{Binding AreFieldsEnabled}"/>

private void AddPOItemExecuted()
{
    _PurchaseOrderDialogBase vm = null;

    // Create a new default PO item
    var poItem = new PurchaseOrderItemEntity
    {
        PurchaseOrderHeaderId = PurchaseOrderHeader.Id,
        JobId = PurchaseOrderHeader.JobId,
        PurchaseOrderKind = PurchaseOrderHeader.PurchaseOrderKind
    };

    // Argument class
    var args = new AddEditPOItemArgsModel
    {
        LocationId = SelectedLocation.Id,
        POItem = poItem,
        SequenceSheets = _sequenceSheets,
        POType = PurchaseOrderHeader.PurchaseOrderType
    };

    switch (PurchaseOrderHeader.PurchaseOrderType)
    {
        // Add Equipment to the PO
        case Entities.Enums.PurchaseOrderType.Equipment:
            if (SelectedVendor.Id == AppCore.DNACompany.Id ||
                SelectedVendor.Id == AppCore.ParagonCompany.Id)
            {
                vm = new AddEditEquipmentFromInventoryViewModel(args, "Add Equipment Item");
            }
            else
            {
                vm = new AddEditPOItemViewModel(args, "Add Equipment Item", SelectedVendor.Id);
            }
            break;

        // Add Lumber to the PO
        case Entities.Enums.PurchaseOrderType.Lumber:
            if (SelectedVendor.Id == AppCore.DNACompany.Id ||
                SelectedVendor.Id == AppCore.ParagonCompany.Id)
            {
                vm = new AddEditLumberFromInventoryViewModel(args, "Add Lumber Item");
            }
            else
            {
                vm = new AddEditLumberPOItemViewModel(args, "Add Lumber Item");
            }
            break;

        // OTHER CASE STATEMENTS OMMITED
    }

    if (vm != null)
    {
        DialogResultEx dialogResult = DialogService.ShowDialog(vm, typeof(MainWindowView));

        if ((bool)dialogResult.DialogResult)
        {
            // For Equipment and Tools, only add one line item
            if (PurchaseOrderHeader.PurchaseOrderType == Entities.Enums.PurchaseOrderType.Equipment ||
                PurchaseOrderHeader.PurchaseOrderType == Entities.Enums.PurchaseOrderType.Tools)
            {
                poItem.EntityState = EntityState.New;
                PurchaseOrderHeader.PurchaseOrderItems.Add(poItem);
            }
            else
            {
                // For all other types, add one line item for each selected Lot
                var selectedSheets = vm.SequenceSheetInfos.Where(x => x.IsSelected).ToList();
                foreach (var selectedSheet in selectedSheets)
                {
                    // Clone the line item
                    var newItem = poItem.Clone();    //<============= THROWS HERE

                    // Adjust properties
                    newItem.JobSequenceSheetId = selectedSheet.JobSequenceSheetId;
                    newItem.EntityState = EntityState.New;
                    newItem.PlanElevation = selectedSheet.JobLotInfo;

                    // Add the Line Item to the PO
                    PurchaseOrderHeader.PurchaseOrderItems.Add(newItem);
                }
            }
        }
    }
}

public static T Clone<T>(this T source)
{
    if (!typeof(T).IsSerializable)
    {
        throw new ArgumentException("The type must be serializable.", nameof(source));
    }

    if (ReferenceEquals(source, null))
    {
        return default;
    }

    using (Stream stream = new MemoryStream())
    {
        IFormatter formatter = new BinaryFormatter();
        formatter.Serialize(stream, source);
        stream.Seek(0, SeekOrigin.Begin);
        return (T)formatter.Deserialize(stream);
    }
}