[Bug] FilePicker throw an exception on WinUI3

Description

FilePicker throw exception System.Runtime.InteropServices.COMException:“Invalid window handle. (0x80070578)” on WinUI3

Steps to Reproduce

1. Create a maui-blazor project
2. Call FilePicker.PickAsync by the following code

        private async void Button_Clicked(object sender, EventArgs e)
        {
            var result = await FilePicker.PickAsync();
        }

1. Press F5 to run *.WinUI3(Package) project
2. Click the button to call method Button_Clicked

Expected Behavior

Actual Behavior

Basic Information

• Version with issue: 6.0.100-preview.4.*
• Last known good version:
• IDE: 16.11.0 Preview1.0
• Platform Target Frameworks:
  • iOS:
  • Android:
  • UWP:
• Android Support Library Version:
• Nuget Packages:
• Affected Devices:

Screenshots

Reproduction Link

Workaround

[realZhangChi]

I understand, thanks

[aokocax]

For windows environment I was able to run it this way. It works flawlessly with both MAUI and MAUI-Blazor.

https://github.com/dotnet/maui/issues/2194#issuecomment-1003773033