private void buttonSelectPODirectory_Click(object sender, EventArgs e)
{
if (textBoxPODirectory.Text.Length > 0)
folderBrowserDialog.SelectedPath = textBoxPODirectory.Text;
else {
Uri uri = new Uri(typeof(OpenDirectory).Assembly.CodeBase);
folderBrowserDialog.SelectedPath = Path.GetFullPath(Path.GetDirectoryName(uri.LocalPath) + @"\..\..\..\..");
}
if (folderBrowserDialog.ShowDialog() == DialogResult.OK)
textBoxPODirectory.Text = folderBrowserDialog.SelectedPath;
}