MainPage.xaml

<RelativePanel Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

        <StackPanel Name="loginSp" RelativePanel.AlignHorizontalCenterWithPanel="True">
            <TextBlock Margin="10" Style="{StaticResource HeaderTextBlockStyle}" Text="Login using.."></TextBlock>
            <Button Margin="5" HorizontalAlignment="Center" Content="Facebook" Click="Login_Click"></Button>
            <Button Margin="5" HorizontalAlignment="Center" Content="Google" Click="Login_Click"></Button>
            <Button Margin="5" HorizontalAlignment="Center" Content="Microsoft Account" Click="Login_Click"></Button>
            <Button Margin="5" HorizontalAlignment="Center" Content="Twitter" Click="Login_Click"></Button>

        </StackPanel>
        <StackPanel RelativePanel.AlignHorizontalCenterWithPanel="True" RelativePanel.Below="loginSp" Name="userSp">
            <Image Width="100" Height="100" Name="userImage"></Image>
            <TextBlock Style="{StaticResource SubheaderTextBlockStyle}" Name="userName"></TextBlock>
        </StackPanel>
    </RelativePanel>