CNCGUI.MainForm.StartGCode C# (CSharp) Method

        private void StartGCode(bool step)
        {
            try
            {
                if (!serialPort.IsOpen)
                {
                    enableControlsForPrinting();
                    MessageBox.Show("Port not open.");
                }
                else if (GCodes.Items.Count == 0)
                {
                    enableControlsForPrinting();
                    MessageBox.Show("GCode list empty.");
                }
                else
                {
                    disableControlsForPrinting();
                    SentRowsLbl.Text = "Sent rows: 0";

                    List<GCodeListViewItem> gcodes = new List<GCodeListViewItem>(GCodes.Items.Count);
                    foreach (GCodeListViewItem gcode in GCodes.Items)
                        gcodes.Add(gcode);
                    backgroundWorker.RunWorkerAsync(new object[] { step, gcodes });
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }