transparency of FontFamily is different from office

[tomuGo]

• .NET Core Version: 6
• Windows version: win11
• Does the bug reproduce also in WPF for .NET Framework 4.8?: Yes
• Is this bug related specifically to tooling in Visual Studio (e.g. XAML Designer, Code editing, etc...)? If yes, please file the issue via the instructions here.
• Security issues and bugs should be reported privately, learn more via our responsible disclosure guidelines.

As shown in the picture，The color depth of the same font is inconsistent。
here is MainWindow.XAML:
<TextBlock Grid.Row="0" Text="Microsoft YaHei " Opacity="1" FontFamily="yahei" FontSize="14" Foreground="#000000"></TextBlock>

here is APP.XAML

`
<Application.Resources>

<ResourceDictionary.MergedDictionaries>

            <ResourceDictionary>
               
                <FontFamily x:Key="yahei">
                    Pack://application:,,,;C:\Windows\Fonts\msyh.ttc
                </FontFamily>
            </ResourceDictionary>
            
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Application.Resources>

`

[miloush]

First of all, there is no guarantee that different applications should render text the same.

Second, that's not how you set a font family, your TextBlock is using the default font. Use FontFamily="Microsoft YaHei" on the TextBlock. There is no need for the dictionary, also the URI is wrong, you cannot use absolute paths with pack URIs, see https://learn.microsoft.com/en-us/dotnet/desktop/wpf/app-development/pack-uris-in-wpf?view=netframeworkdesktop-4.8.

[lindexi]

@tomuGo You need to use Microsoft YaHei UI.

<TextBlock FontFamily="Microsoft YaHei UI" />

See https://learn.microsoft.com/en-us/dotnet/desktop/wpf/advanced/packaging-fonts-with-applications

[lindexi]

@tomuGo Is your problem solved?