C# ListView如何记录动态日志

Question

主程序里有标志位，标志位置1时，会调用Writelog（）；
private void WriteLog(String msg)
{

             ListViewItem item = new ListViewItem();
             item = listView1.Items.Add(DateTime.Now.ToString("yyyy_MM_dd"));
             item.SubItems.Add(DateTime.Now.ToString("yyyy/MM/dd hh:mm:ss"));
             item.SubItems.Add(msg);





     }