/// <summary>
 /// Called when one for the file monitors detects a change.
 /// </summary>
 /// <param name="sender"></param>
 void monitor_FileChanged(FileMonitor sender)
 {
     lock (_sync)
     {
         _hasChanged = true;
         _lastChange = DateTime.Now.Ticks;
     }
 }
 /// <summary>
 /// Called when one for the file monitors detects a change.
 /// </summary>
 /// <param name="sender"></param>
 void monitor_FileChanged(FileMonitor sender)
 {
     lock (_sync)
     {
         _hasChanged = true;
         _lastChange = DateTime.Now.Ticks;
     }
 }