modernkeepass/ModernKeePass/MainPage.xaml

<Page
    x:Class="ModernKeePass.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:ModernKeePass"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Button Content="Open password database" HorizontalAlignment="Center" VerticalAlignment="Center" Click="Button_Click" />
        <TextBlock Name="textBlock" HorizontalAlignment="Center" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Center" Margin="0,100,0,0" />
    </Grid>
</Page>