private void ChangeHVACMode() { try { if (netOnewayChannel != null) { ServiceBusHelper.SendHVACModeValue(netOnewayChannel, tsDeviceId.Text, "HVAC-1", hvacMode); AddLog(String.Format("HVAC Mode is set to {0}", ServiceBusHelper.GetHVACModeString(hvacMode))); } else { MessageBox.Show("netOnewayChannel is not initialized", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } } catch (Exception ex) { MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } }