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private void btXmlConfigPath_Click(object sender, EventArgs e)
        {
            OpenFileDialog dialog = new OpenFileDialog();
            dialog.Filter = "XML-Files (*.xml)|*.xml|All Files (*.*)|*.*";
            dialog.Title = "XmlConfig-Auswahl";
            if (dialog.ShowDialog() == DialogResult.OK)
            {
                config.XmlConfigPath = dialog.FileName;
                laXmlConfigPath.Text = config.XmlConfigPath;
            }
        }