zxc/SSS/redphoto.xaml

<Window x:Class="SSS.redphoto"
        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:SSS"
        mc:Ignorable="d"
        Title="redphoto" Height="450" Width="800">
    <Grid Background="Lavender">
        <Grid.RowDefinitions>
            <RowDefinition Height="*"></RowDefinition>
            <RowDefinition Height="35"></RowDefinition>
        </Grid.RowDefinitions>
        <StackPanel Grid.Row="0" HorizontalAlignment="Center" VerticalAlignment="Center">
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
                <Image Width="200" Height="200" Name="FF" Source="Photo.jpg"></Image>
            </StackPanel>
            <StackPanel Orientation="Horizontal" Margin="0,10,0,0">
                <Border BorderThickness="2" CornerRadius="7"  Background="White" Width="30" Height="30">
                    <Button FontSize="21" Foreground="Gray" FontWeight="Bold" Content="-" Click="BackPhoto"></Button>
                </Border>
                <Border BorderThickness="2" CornerRadius="7"  Background="White" Height="30" Margin="5,0,0,0">
                    <Button   Click="SelectThis">Изменить фото на выбранное</Button>
                </Border>
                <Border BorderThickness="2" CornerRadius="7"  Background="White" Width="30" Height="30" Margin="5,0,0,0">
                    <Button FontSize="21" Foreground="Gray" FontWeight="Bold" Content="+" Click="NextPhoto"></Button>
                </Border>
            </StackPanel>

        </StackPanel>
        <StackPanel Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="3,0,0,0">
            <Border BorderThickness="2" CornerRadius="7" BorderBrush="#bababa" Background="White" Width="100" Height="30">
                <Button  Content="Назад" FontSize="16" Click="Back"></Button>
            </Border>
        </StackPanel>
    </Grid>
</Window>