C# WPF - Problem z dodawaniem dynamicznej controlki

            Label label = new Label();
            int loc = 10;

            for (int i = 1; i <= 5; i++)
            {
                label.Height = 28;
                label.Width = 100;
                label.HorizontalAlignment = HorizontalAlignment.Left;
                label.VerticalAlignment = VerticalAlignment.Top;
                label.Content = "test";
                label.Margin = new Thickness(211, loc, 0, 0);
                grid1.Children.Add(label);
                loc += 34;

        Title="Tech tree" Height="450" Width="800">

    <Grid x:Name="grid1">
    </Grid>
</Window>

Label label = new Label();