Makhanov6/Chekryshov_lessons/Page/MainWindow.xaml

<Window x:Class="Chekryshov_lessons.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:Chekryshov_lessons"
        mc:Ignorable="d"
        Title="MainWindow" Height="460" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="42"/>
            <RowDefinition />
            <RowDefinition Height="42"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
           
            
        </Grid.ColumnDefinitions>
        <Rectangle Fill="#FFF4F4F5" StrokeThickness="0"/>
        <Button Content="Назад" HorizontalAlignment="Left" Margin="10,10,0,10" x:Name="ButtonBack" Width="75"/>
        <Frame x:Name="MainFrame" Content="Frame" Grid.Row="1" Navigated="MainFrame_OnNavigated" Source="Page/AuthPage.xaml"/>
        
    </Grid>
</Window>