The ComboBox doesn't select value if it's enum

Describe the bug Hi, the binding to the ComboBox with SelectedValuePath doesn’t work when I’ve placed the enum to SelectedValue. Please take a look at the following code.

Steps to reproduce the bug

    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
        <ComboBox SelectedValuePath="Value" 
                  DisplayMemberPath="Text"
                  ItemsSource="{x:Bind TestSource}"
                  SelectedValue="{x:Bind MyValue, Mode=TwoWay}"/>
    </StackPanel>

    public sealed partial class MainWindow : Window {
        public MainWindow() {
            TestSource = new DisplayItem[] {
                new DisplayItem(MyValues.Value1, "Value1"),
                new DisplayItem(MyValues.Value2, "Value2"),
            };
            MyValue = TestSource[0].Value;

            this.InitializeComponent();
        }

        public IList<DisplayItem> TestSource { get; }
        public MyValues MyValue { get; set; }
    }

    public enum MyValues { Value1, Value2 }

    public class DisplayItem {
        public DisplayItem(MyValues value, string text) {
            Value = value;
            Text = text;
        }

        public MyValues Value { get; }
        public string Text { get; }
    }

Expected behavior

Screenshots

Version Info

NuGet package version:

[WinUI 3 - Windows App SDK 0.8: 0.8.0] If you’re seeing your issue in older previews of WinUI 3, please try this release.

Windows app type:

UWP	Win32
	Yes

Windows version	Saw the problem?
Insider Build (xxxxx)
May 2021 Update (19043)
October 2020 Update (19042)
May 2020 Update (19041)	Yes
November 2019 Update (18363)
May 2019 Update (18362)
October 2018 Update (17763)
April 2018 Update (17134)
Fall Creators Update (16299)
Creators Update (15063)

Device form factor	Saw the problem?
Desktop	Yes
Xbox
Surface Hub
IoT

Additional context

[alexdi220]

@GeorgeKerwood Did you try my code? It’s doesn’t work. I know many ways to bind the SelectedItem. And your approach will work. But it has a lot of excessive code. The SelectedValuePath property exists only for one thing - to select a value instead of a whole item. This is a very simple and easy scenario when the ComboBox does “work” instead of you. In this case, you no need to write a code that syncs a real value in the viewmodel\model and the SelectedItem in the ComboBox. It’s a basic feature.

[github-actions[bot]]

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