ColorPicker incompatible with AOT

[Marv51]

Describe the bug

I'm trying to enable NativeAOT compilation for my app.
I am using Community Toolkit 8.2 Preview 2 (with CsWinRT 2.2) in WinAppSDK/WinUI 1.6.4 on .NET 9.0.1

With AOT enabled, when I click on a ColorPickerButton, which should show a ColorPicker my app crashes with a NotSupportedException. It works perfectly without AOT.

'ICustomProperty support used by XAML binding for type 'CommunityToolkit.WinUI.Controls.SegmentedItem' (property 'Name') requires the type to marked with 'WinRT.GeneratedBindableCustomPropertyAttribute'. If this is a built-in type or a type that can't be marked, a wrapper type should be used around it that is marked to enable this support.'

Steps to reproduce

My colorpickerbutton looks like this:

<!--  xmlns:controls="using:CommunityToolkit.WinUI.Controls"  --->
<controls:ColorPickerButton Background="#818181"
            HorizontalAlignment="Stretch"
            SelectedColor="{x:Bind myObject.Color, Mode=TwoWay}">
</controls:ColorPickerButton>

Expected behavior

No exception

Screenshots

Can provide if required.

Code Platform

• UWP
• WinAppSDK / WinUI 3
• Web Assembly (WASM)
• Android
• iOS
• MacOS
• Linux / GTK

Windows Build Number

• Windows 10 1809 (Build 17763)
• Windows 10 1903 (Build 18362)
• Windows 10 1909 (Build 18363)
• Windows 10 2004 (Build 19041)
• Windows 10 20H2 (Build 19042)
• Windows 10 21H1 (Build 19043)
• Windows 10 21H2 (Build 19044)
• Windows 10 22H2 (Build 19045)
• Windows 11 21H2 (Build 22000)
• Other (specify)

Other Windows Build number

Windows 11 24H2 (Build 26100)

App minimum and target SDK version

• Windows 10, version 1809 (Build 17763)
• Windows 10, version 1903 (Build 18362)
• Windows 10, version 1909 (Build 18363)
• Windows 10, version 2004 (Build 19041)
• Windows 10, version 2104 (Build 20348)
• Windows 11, version 22H2 (Build 22000)
• Other (specify)

Other SDK version

Windows 11, version Build 22621

Visual Studio Version

2022

Visual Studio Build Number

Version 17.12.4

Device form factor

Desktop

Additional context

I believe this Binding in ColorPicker might be at fault:

Windows/components/ColorPicker/src/ColorPicker.xaml

Line 241 in 9830e43

Value="{Binding ElementName=ColorPanelSelector, Path=SelectedItem.Name}">

And I can indeed, like the exception says, not find any GeneratedBindableCustomProperty attribute on SegmentedItem.

Help us help you

No, I'm unable to contribute a solution.

[michael-hawker]

Related, if not duplicate of #509