Forex_Strategy_Builder.Instrument_Editor.BtnDelete_Click C# (CSharp) Method

        void BtnDelete_Click(object sender, EventArgs e)
        {
            string symbol = lbxInstruments.SelectedItem.ToString();
            int    index  = lbxInstruments.SelectedIndex;

            if (symbol == "EURUSD" || symbol == "GBPUSD" ||
                symbol == "USDCHF" || symbol == "USDJPY" ||
                symbol == Data.Symbol)
            {
                MessageBox.Show(
                Language.T("You cannot delete this instrument!"),
                Language.T("Instrument Editor"), MessageBoxButtons.OK, MessageBoxIcon.Information);

                return;
            }

            DialogResult dr = MessageBox.Show(
                Language.T("Do you want to delete the selected instrument?"),
                Language.T("Instrument Editor"), MessageBoxButtons.YesNo, MessageBoxIcon.Question);

            if (dr == DialogResult.Yes)
            {
                Instruments.InstrumentList.Remove(symbol);
                lbxInstruments.Items.Remove(symbol);
                if (index > 0)
                    lbxInstruments.SelectedIndex = index - 1;
                else
                    lbxInstruments.SelectedIndex = index;

                bNeedReset = true;
            }

            return;
        }