private void btnBrowse_Click(object sender, RoutedEventArgs e) { OpenFileDialog openFileDialog = new OpenFileDialog(); openFileDialog.Filter = "Application|*.exe|All Files|*.*"; openFileDialog.DefaultExt = ".exe"; if (openFileDialog.ShowDialog() == true) { txtApp.Text = openFileDialog.FileName; myClient.ChangeBot(openFileDialog.FileName); } }