AmbiguousMatchException when BindableProperty is hidden in a derived class and is then set in XAML

[dilyantraykov]

Description

Consider the following custom control which hides a BindableProperty:

public class CustomCheckBox : CheckBox
{
    public static new readonly BindableProperty IsCheckedProperty =
        BindableProperty.Create(nameof(IsChecked), typeof(bool?), typeof(CustomCheckBox), false, BindingMode.TwoWay);

    public new bool? IsChecked
    {
        get { return (bool?)this.GetValue(IsCheckedProperty); }
        set { this.SetValue(IsCheckedProperty, value); }
    }
}

Notice that the type of the new property (bool?) differs from that of the default property (bool).

When trying to set the new property in XAML, an AmbiguousMatchException is thrown with the following message:
"Multiple properties with name 'CustomCheckBox.IsChecked' found."

Setting the property in code-behind works as expected.

The exception seems to stem from the TrySetValue method of the ApplyPropertiesVisitor which uses the GetRuntimeProperty method. Actually, calling the method in the following manner is also sufficient to reproduce the exception:

this.checkBox.GetType().GetRuntimeProperty("IsChecked");

Possible fix would be to use the GetRuntimeProperties method instead and then check the DeclaringType property to retrieve only a single property.

var properties = this.checkBox.GetType().GetRuntimeProperties();
var property = properties.FirstOrDefault(x => x.Name == "IsChecked" && x.DeclaringType == this.checkBox.GetType());

Note: Removing the "new" keyword does not resolve the exception.

Steps to Reproduce

1. Open the project from the referenced reproduction repository.
2. Try running the project.

Expected: The project runs successfully and the CheckBox is displayed.
Actual: The application crashes with an AmbiguousMatchException.

Link to public reproduction project repository

https://github.com/telerik/ms-samples/tree/main/Maui/HiddenBindableProperty

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

Android, Windows

Affected platform versions

Windows SDK 10.0.19041.0, Android 33

Did you find any workaround?

No response

Relevant log output

No response

[jsuarezruiz]

@StephaneDelcroix Thoughts?

[ghost]

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

[StephaneDelcroix]

@StephaneDelcroix Thoughts?

looks valid. SetValue doesn't set the c# property though, but the BP. But it still looks for the c# prop to get the type and attributes, and the ambiguous match comes from there

[Zhanglirong-Winnie]

Verified this issue with Visual Studio Enterprise 17.7.0 Preview 2.0. Can repro on android and windows platform with sample project.
https://github.com/telerik/ms-samples/tree/main/Maui/HiddenBindableProperty