There are 3 CS0436 warnings after deploying C# WinUI 3 project with WinAppSdk 1.3.230502000

[XamlTest]

Describe the bug

There are 3 CS0436 warnings after deploying C# WinUI 3 project with WinAppSdk 1.3.230502000.

Steps to reproduce the bug

Environment:
OS Version: Win10 & Win11
VS Build: 17.6.2 Preview 1.0 [33724.341.d17.6] & 17.7.0 Preview 2.0 [33725.600.main]

More info:
This issue does not reproduce when update WinAppSdk to 1.2.230217.4.

Repro Steps:

1. Install the Windows App SDK 1.3.1 Runtime from here
2. Create a new app using the "Blank App, Packaged (WinUI 3 in Desktop)" project template. (Make sure the WinAppSdk is 1.3.230502000)
3. Add this property to the first PropertyGroup of project file: <WindowsPackageType>None</WindowsPackageType>
4. Select the 'Unpackaged' launch profile in the Start drop down.
5. Build and run

Actual Result:
Run successfully, but there are 3 warnings in Error List.

Expected Result:
Run successfully without errors and warnings.

Expected behavior

No response

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.3.1: 1.3.230502000

Windows version

Windows 11 (22H2): Build 22621, Windows 10 (21H2): Build 19044

Additional context

No response

[evelynwu-msft]

Duplicate of #3591