// opens file browser for choosing a certificate
private void btnFile_Click(object sender, RoutedEventArgs e)
{
// browse for certificate and add to eapconfig
var filepath = FileDialog.AskUserForClientCertificateBundle();
if (string.IsNullOrEmpty(filepath)) return;
this.filepath = filepath;
tbCertBrowser.Text = filepath;
// scroll to end of textbox
tbCertBrowser.CaretIndex = tbCertBrowser.Text.Length;
var rect = tbCertBrowser.GetRectFromCharacterIndex(tbCertBrowser.CaretIndex);
tbCertBrowser.ScrollToHorizontalOffset(rect.Right);
ValidateCertBrowserFields();
}
