downkyicore/DownKyi/Views/MainWindow.axaml

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="using:DownKyi.ViewModels"
        xmlns:prism="http://prismlibrary.com/"
        x:Class="DownKyi.Views.MainWindow"
        x:DataType="vm:MainWindowViewModel"
        xmlns:i="using:Avalonia.Xaml.Interactivity"
        xmlns:ia="clr-namespace:Avalonia.Xaml.Interactions.Core;assembly=Avalonia.Xaml.Interactions"
        prism:ViewModelLocator.AutoWireViewModel="True"
        Width="1100"
        Height="750"
        MinWidth="800"
        MinHeight="550"
        Title="{DynamicResource AppName}"
        Icon="/Resources/favicon.ico">

    <i:Interaction.Behaviors>
        <ia:EventTriggerBehavior EventName="Closed">
            <ia:InvokeCommandAction />
        </ia:EventTriggerBehavior>
    </i:Interaction.Behaviors>
    <Border BorderBrush="{DynamicResource BrushWindowBorder}" BorderThickness="1">

        <Grid Background="{DynamicResource BrushBackground}">
            <Grid.RowDefinitions>
                <RowDefinition />
            </Grid.RowDefinitions>
            <!--<Grid
                Grid.Row="0"
                Background="{DynamicResource BrushCaptionBackground}"
                KeyboardNavigation.TabNavigation="None">

                <Grid.ColumnDefinitions>
                    <ColumnDefinition />
                    <ColumnDefinition Width="50" />
                    <ColumnDefinition Width="50" />
                    <ColumnDefinition Width="50" />
                    <ColumnDefinition Width="50" />
                </Grid.ColumnDefinitions>
                <StackPanel
                    Grid.Column="0"
                    Margin="10,0"
                    Orientation="Horizontal">
                    <Image
                        Width="20"
                        Height="20"
                        Source="/Resources/favicon.ico" />
                    <TextBlock
                        Grid.Column="0"
                        Margin="10,0,0,0"
                        VerticalAlignment="Center"
                        FontSize="12"
                        Foreground="{DynamicResource BrushCaptionForeground}"
                        Text="{DynamicResource AppName}" />
                </StackPanel>
            </Grid>-->

            <ContentControl Grid.Row="1" prism:RegionManager.RegionName="ContentRegion" />

            <Border
                Grid.Row="1"
                MinHeight="30"
                Margin="0,0,0,20"
                HorizontalAlignment="Center"
                VerticalAlignment="Bottom"
                Background="{DynamicResource BrushBackgroundDark}"
                CornerRadius="15"
                IsVisible="{Binding MessageVisibility}">
                <TextBlock
                    Margin="15,5,15,5"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    Background="{x:Null}"
                    FontSize="12"
                    Foreground="{DynamicResource BrushForegroundDark}"
                    Text="{Binding Message}"
                    TextAlignment="Center" />
            </Border>
        </Grid>
    </Border>

</Window>