Plugininterface.xaml

<UserControl x:Class="PluginTemplate.Plugininterface"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:PluginTemplate"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="522.895">
    <Grid>
        <Button x:Name="myButton" Content="Load figure" HorizontalAlignment="Left" Height="51" Margin="10,339,0,0" VerticalAlignment="Top" Width="111" Click="LoadFigureButton"/>
        <TextBox x:Name="SolidHeight" HorizontalAlignment="Left" Height="31" Margin="10,69,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="503" Text="C:\_Projekte\packageboard\01\properties.xml"/>
        <Label Content="Path to properties" HorizontalAlignment="Left" Height="30" Margin="10,39,0,0" VerticalAlignment="Top" Width="503"/>
        <Label Content="Read pr_lichte_breite_L from property and give the height to the bric" HorizontalAlignment="Left" Height="108" Margin="10,150,0,0" VerticalAlignment="Top" Width="503"/>

    </Grid>
</UserControl>