PowerToys/src/modules/FileLocksmith/FileLocksmithUI/MainWindow.xaml

<winuiex:WindowEx
    x:Class="FileLocksmithUI.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:contract7NotPresent="http://schemas.microsoft.com/winfx/2006/xaml/presentation?IsApiContractNotPresent(Windows.Foundation.UniversalApiContract,7)"
    xmlns:contract7Present="http://schemas.microsoft.com/winfx/2006/xaml/presentation?IsApiContractPresent(Windows.Foundation.UniversalApiContract,7)"
    xmlns:converters="using:CommunityToolkit.WinUI.UI.Converters"
    xmlns:converters1="using:PowerToys.FileLocksmithUI.Converters"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:interop="using:FileLocksmith.Interop"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:views="using:PowerToys.FileLocksmithUI.Views"
    xmlns:winuiex="using:WinUIEx"
    x:Uid="AppTitle"
    Width="680"
    MinWidth="480"
    MinHeight="320"
    IsShownInSwitchers="True"
    IsTitleBarVisible="True"
    mc:Ignorable="d">
    <winuiex:WindowEx.Backdrop>
        <winuiex:MicaSystemBackdrop />
    </winuiex:WindowEx.Backdrop>
    <Grid>

        <Grid.RowDefinitions>
            <RowDefinition Height="32" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Grid x:Name="titleBar">
            <StackPanel
                Margin="16,8,8,8"
                VerticalAlignment="Top"
                Orientation="Horizontal">
                <TextBlock FontFamily="{ThemeResource SymbolThemeFontFamily}" Text="&#xEA3F;" />
                <TextBlock
                    x:Uid="AppTitleText"
                    Margin="12,0,0,0"
                    Style="{StaticResource CaptionTextBlockStyle}" />
            </StackPanel>
        </Grid>
        <views:MainPage x:Name="mainPage" Grid.Row="1" />
    </Grid>
</winuiex:WindowEx>