41P_Boldin_Exam_01/ExamBoldin/MainWindow.xaml

<Window x:Class="ExamBoldin.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:ExamBoldin"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="6*"/>
            <RowDefinition Height="25*"/>
        </Grid.RowDefinitions>
        <TextBlock Text="Книжный магазин" Grid.Row="0" FontSize="40px" HorizontalAlignment="Center"></TextBlock>
        <Frame Name="frmMane" Grid.Row="1" NavigationUIVisibility="Hidden"></Frame>
    </Grid>
</Window>