WinAppSDK 1.1 stale version, custom dependency property in unpackaged app throw exception

[shelllet]

Describe the bug

windowsappsdk 1.1 stale versioin, Custom dependencey property in unpackaged app throw exception

exception thrown at 0x00007FFF4B7A474C (KernelBase.dll) in Simple.exe: WinRT originate error - 0x80004005 : 'The property 'File' was not found in type 'Simple.FilePicker'.'. Exception thrown at 0x00007FFF4B7A474C (KernelBase.dll) in Simple.exe: WinRT originate error - 0x802B000A : 'The property 'File' was not found in type 'Simple.FilePicker'. [Line: 0 Position: 0]'.

Steps to reproduce the bug

generic.xaml

     <Style TargetType="local:FilePicker" >
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="local:FilePicker">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*"></ColumnDefinition>
                            <ColumnDefinition Width="Auto"></ColumnDefinition>
                        </Grid.ColumnDefinitions>
                        <TextBox x:Name="TextBox" Grid.Column="0" Header="{TemplateBinding Header}" 
                                 DataContext="{TemplateBinding File}"  Text="{Binding Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></TextBox>
                        <Button x:Name="Button" Grid.Column="1" VerticalAlignment="Bottom">
                            <SymbolIcon Symbol="OpenFile"></SymbolIcon>
                        </Button>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

idl defined:

runtimeclass FilePicker : Microsoft.UI.Xaml.Controls.Control
    {
        FilePicker();
        Object Header;
        String File;
        static Microsoft.UI.Xaml.DependencyProperty HeaderProperty{ get; };
        static Microsoft.UI.Xaml.DependencyProperty FileProperty{ get; };
    }

used:

<local:FilePicker x:Name="_File" Header="Select File" File="{x:Bind ActionData.(local:TypeFile.File), Mode=TwoWay}" ></local:FilePicker>

Expected behavior

everything is ok windowsappsdk 1.0.3

Screenshots

NuGet package version

No response

Windows app type

• [ ] UWP
• [X] Win32

Device form factor

Desktop

Windows version

Windows 11 (21H2): Build 22000

Additional context

[Scottj1s]

@shelllet Are you saying this is a regression from Windows App SDK 1.0.3 to 1.1? Can you provide a complete repro project?

[shelllet]

@Scottj1s My project was upgraded Windows App Sdk to 1.2 , and this question didn't appear again

[github-actions[bot]]

This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 5 days.