AnotherOne/MainWindow.xaml

<Window x:Class="PracticaDemoexam.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:PracticaDemoexam"
        mc:Ignorable="d"
        Title="Лучшее приложение в мире" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="24"/>
            <RowDefinition Height="395*"/>
        </Grid.RowDefinitions>
        <DockPanel LastChildFill="True">
            <Image Source="Resources/Приятный шелест.png"/>
            <TextBlock Text="Приятный шелест" TextAlignment="Center" FontWeight="Bold" FontSize="20" FontFamily="Monotype Corsiva"/>
        </DockPanel>
        <Frame x:Name="fMain" Grid.Row="1"/>
    </Grid>
</Window>