private void btn_Respond_Click(object sender, EventArgs e)
 {
     if (lbox_Questions.SelectedIndex != -1)
     {
         var                 foo      = lbox_Questions.SelectedItem;
         Question            question = foo as Question;
         Form_AcceptQuestion dialog   = new Form_AcceptQuestion(currentuser, question);
         dialog.ShowDialog();
     }
     else
     {
         MessageBox.Show("U heeft geen vraag gekozen");
     }
 }
 private void btn_Respond_Click(object sender, EventArgs e)
 {
     if (lbox_Questions.SelectedIndex != -1)
     {
         var foo = lbox_Questions.SelectedItem;
         Question question = foo as Question;
         Form_AcceptQuestion dialog = new Form_AcceptQuestion(currentuser, question);
         dialog.ShowDialog();
     }
     else
     {
         MessageBox.Show("U heeft geen vraag gekozen");
     }
 }