Tree view items are not indented when created from code-behind

[martinchrzan]

There is a different look if I create a treeview from code vs in xaml

Here is my code definition

            var level3 = new TreeViewItem() { Header = "Level 3", IsExpanded = true };
            var level2 = new TreeViewItem() { Header = "Level 2", IsExpanded = true };
            var level1 = new TreeViewItem() { Header = "Level 1", IsExpanded = true };
            treeViewFromCode.Items.Add(level1);
            level1.Items.Add(level2);
            level2.Items.Add(level3);

Here is XAML

<Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>

        <TreeView x:Name="treeViewFromCode"/>

        <TreeView Grid.Row="1">
            <TreeViewItem Header="Level 1" IsExpanded="True">
                <TreeViewItem Header="Level 2" IsExpanded="True">
                    <TreeViewItem Header="Level 3" IsExpanded="True"/>
                </TreeViewItem>
            </TreeViewItem>
        </TreeView>
    </Grid>

When I run it:

When I am not using ModernWPF, it looks like this (correctly)

Used version 0.9.3

[Kinnara]

Thanks for reporting.