如何从Windows Build 1903中提供的Xaml控件禁用默认的Shadow？

Question

So, Windows build 1903 sdk has applied a default "Shadow" on certain xaml controls, as can be seen from the list. I am using CommandBar in a project, and the "See more" button has an associated Popup with it, however I find no way to disable the shadow of it. This shadow does not show in any other previous windows Builds. Reference: https://docs.microsoft.com/en-us/windows/uwp/design/layout/depth-shadow

In the microsoft's blog post regarding this, they have given out the following code to remove shadow from a flyout like object, however they did not specify any code for removing the shadow from other controls.

This particular property in the following code named "IsDefaultShadowEnabled" is only accessible from the FlyoutPresenterStyles, I have tried from other controls, such as GridView, Border, couldn't find it in there. I tried attaching this flyout with the flyoutbase associated with the command bar. but did not help.

I added the code for the commandbar I am having the shadow on.

  <Flyout>
       <Flyout.FlyoutPresenterStyle>
           <Style TargetType="FlyoutPresenter">
               <Setter Property="IsDefaultShadowEnabled" Value="False" />
          </Style>
       </Flyout.FlyoutPresenterStyle>
  </Flyout>



    <CommandBar Background="Yellow" FocusVisualPrimaryThickness="0" FocusVisualSecondaryThickness="0">
        <CommandBar.CommandBarOverflowPresenterStyle>
            <Style TargetType="CommandBarOverflowPresenter">
                <Setter Property="BorderThickness" Value="0"/>
            </Style>
        </CommandBar.CommandBarOverflowPresenterStyle>
        <CommandBar.SecondaryCommands>

            <AppBarButton Label="YELLOW!"/>
            <AppBarButton  Label="YELLOW!"/>
            <AppBarButton  Label="YELLOW!"/>
        </CommandBar.SecondaryCommands>

    </CommandBar>

Can you guys tell me any workaround to fix the shadow issue if there's no direct solution?

Answer 1

With @ Faywang - MSFT 's advice, the issue was registered in Win UI team's repository,

Mr. @jevansaks response mentioned of using SDK Build Version 1903 as the Target version , additionally setting the MaxTestedVersion to the version one tested their app on.

https://github.com/microsoft/microsoft-ui-xaml/issues/1136

In conclusion, to fix Shadows, we need to set Target Version for building app to SDK 1903, however we can set MaxTestedVersion to the version we tested our app on, for instance it can be 1809.