BottomBarItem.xaml

<Button
    x:Class="FileEx.BottomBarItem"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:FileEx"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    HorizontalAlignment="Right" 
    BorderBrush="{x:Null}" 
    BorderThickness="1" FontWeight="Thin"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <StackPanel MinWidth="35" Grid.Column="1">
        <TextBlock x:Name="imageText" FontSize="16" Text="c" FontFamily="Assets/Font/iconFont.ttf#iconfont" HorizontalAlignment="Center" VerticalAlignment="Bottom" />
        <TextBlock x:Name="contentText" Text="copy" Grid.Row="1" FontFamily="Assets/Font/Custom/Raleway-Light.ttf#Raleway" HorizontalAlignment="Center" VerticalAlignment="Top" FontSize="12" FontWeight="Normal" />
    </StackPanel>
</Button>