WPF DataGrid memory leak in VS2022

This issue has been moved from a ticket on Developer Community.

---

[severity:I’m unable to use this version] [regression] [worked-in:16.11.3] Original Source I have this code, and no matter what I do I keep getting a memory leak from the DataGrid data update. I’ve been looking at all the other answers to this problem here for days and I haven’t found anything that works for me. I have a WPF window and this code to update the data (it is a small version of what happens in the real code, but I get the same bug). Works fine in VS2019.

I have this WPF code:

<Window x:Class="TremendoMemoryLeak.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:TremendoMemoryLeak"
        mc:Ignorable="d"
        DataContext="{Binding RelativeSource={RelativeSource Self}}"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <DataGrid ItemsSource="{Binding Hmis, Mode=OneWay}" AutoGenerateColumns="False" IsReadOnly="True">
            <DataGrid.Columns>
                <DataGridTemplateColumn Header="Estado">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Ellipse Fill="{Binding Estado}" HorizontalAlignment="Left" Height="25" Stroke="Black" VerticalAlignment="Top" Width="25"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
                <DataGridTextColumn Header="Dato1" Binding="{Binding Dato1}"/>
                <DataGridTextColumn Header="Dato2" Binding="{Binding Dato2}"/>
            </DataGrid.Columns>
        </DataGrid>
    </Grid>
</Window>

This class code:

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window, INotifyPropertyChanged
{
    public ObservableCollection<Datos> Hmis { get; } = new ObservableCollection<Datos>();
    private System.Threading.Timer timer;

    public MainWindow()
    {
        InitializeComponent();
        timer = new System.Threading.Timer(ActualizacionUI_Tick, null, 1000, 1000);
    }

    public event PropertyChangedEventHandler? PropertyChanged;

    private void ActualizacionUI_Tick(object data)
    {
        Datos dato1 = new Datos() { Dato1 = "1", Dato2 = "2" };

        Datos dato2 = new Datos() { Dato1 = "1", Dato2 = "2" };

        Datos dato3 = new Datos() { Dato1 = "1", Dato2 = "2" };

        Dispatcher.Invoke(() =>
        {
            dato1.Estado = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#FF5DC75D"));
            dato2.Estado = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#FF5DC75D"));
            dato3.Estado = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#FF5DC75D"));
            Hmis.Clear();
            Hmis.Add(dato1);
            Hmis.Add(dato2);
            Hmis.Add(dato3);
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Hmis"));
        });
    }
}

And this data class:

public class Datos : INotifyPropertyChanged
{
    public Brush Estado { get; set; }
    public string Dato1 { get; set; }
    public string Dato2 { get; set; }

    public event PropertyChangedEventHandler? PropertyChanged;
}

---

Original Comments

Feedback Bot on 10/20/2021, 11:07 PM:

We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.

---

Original Solutions

(no solutions)

[sneik15]

Probed in Framework versions 4.6.1/4.8 and net 5: Example SLN: TremendoMemoryLeak.zip Only happens in visual studio 2022

[sneik15]

@singhashish-wpf I don’t know how to correctly implement a DependencyProperty version.