MARKUS

<Window x:Class="UploadLicenseTest.MainWindow"

        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:UploadLicenseTest"

        mc:Ignorable="d"

        Title="MainWindow" Height="450" Width="400">

    <Grid>

        <Grid.RowDefinitions>

            <RowDefinition Height="Auto"/>

            <RowDefinition/>

        </Grid.RowDefinitions>

        <StackPanel>

            <Button Width="100" Height="30" Content="Select File" Click="SelectFile_Click"/>

            <TextBlock x:Name="txtFilename" Height="30"/>

            <Button Width="100" Height="30" Content="Upload File" Click="UploadFile_Click"/>

            <Button Width="100" Height="30" Content="Get FileInfo" Click="GetFileInfo_Click"/>

        </StackPanel>

        <RichTextBox x:Name="txtError" Grid.Row="1"/>

    </Grid>

</Window>