Windows Form ListView clear item selection

ListView.ItemSelectionChanged Event, Occurs when the selection state of an item changes.

Clear selection in selectionIndexChanged event. 

bool clearSelection = false;

ListViewItem lastSelectedItem = null;

private void listViewDevice_SelectedIndexChanged(object sender, EventArgs e)

{

           try

            {

                if (listViewDevice.SelectedItems.Count > 0 && null != listViewDevice.FocusedItem)

                {

                    selectedItem = listViewDevice.SelectedItems[0];
      //This block of code prevents selection index changed fires twices on the same item.

                    if (clearSelection && lastSelectedItem != null && lastSelectedItem == selectedItem)   

                    {

                        listViewDevice.SelectedItems[0].Focused = false;

                        listViewDevice.SelectedItems[0].Selected = false;

                        clearSelection = false; lastSelectedItem = null;

                        return;

                    }

                    if (SystemColors.GrayText == selectedItem.ForeColor)

                    {

 

                        MessageBox.Show("Selection cleared.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);

                        listViewDevice.SelectedItems[0].Focused = false;     //Clear selection called selectionIndexChanged twice

                        listViewDevice.SelectedItems[0].Selected = false;

 

                        clearSelection = true; lastSelectedItem = selectedItem;

 

                        return;

                    }

}

            catch (Exception ex) { }

}