private void btn_generate_Click(object sender, RoutedEventArgs e) { string text = TBX_text.Text; string message = ""; byte[] pic = null; int size = 0; foreach (RadioButton rb in spSize.Children) { if ((bool)rb.IsChecked) { size = Convert.ToInt32(rb.Content); break; } } if (QR.genQR(text, size, out message, out pic)) { window pickWindow = new window(pic, 150, 150); pickWindow.Show(); } }