dadaddadadda/MainWindow.xaml

<Window x:Class="KryuchkoToursApp.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:KryuchkoToursApp"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid >
        <Grid.RowDefinitions >
            <RowDefinition Height="75"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="30"/>
        </Grid.RowDefinitions>
        <Image Source="Resources/логотип.png" HorizontalAlignment="Right" Margin="0,0,691,1" Width="101" Height="101" VerticalAlignment="Bottom"></Image>
        <TextBlock HorizontalAlignment="Left" Margin="354,25,0,0" TextWrapping="Wrap" Text="Header" VerticalAlignment="Top" FontSize="40" Height="53" Width="142" Grid.RowSpan="2"/>
        <Frame ContentRendered="MainFrame_ContenrRendered" Grid.Row="1" Name="MainFrame"></Frame>
        <Grid Grid.Row="2" Background="#FF4BE4AC"></Grid>
        <Grid Background="#FF9EE2E2" Panel.ZIndex="-2">
            <Button Content="back" HorizontalAlignment="Right"  Name="BtnBack" Click="BtnBack_Click"/>
        </Grid>
    </Grid>
</Window>