private void buttonBankCard_Click(object sender, EventArgs e) { int cardIDOfCardToBank = -1; if (listBox1.Items.Count != 0) { cardIDOfCardToBank = (int)((MonopolyDealServiceReference.Card)listBox1.SelectedValue).cardID; requestHandler.bankCard(cardIDOfCardToBank); } else { buttonBankCard.Enabled = false; } //Update State buttonPollMD_Click(null, null); }