I have an application where I am looking for a text file and if there are any changes made to the file I am using the onchanged eventhandler to handle the event. I am using the notifyfilters.Lastwritetime but still the event is getting fired twice.Here is the code.

public void Initialize()
{
   FileSystemWatcher _fileWatcher = new FileSystemWatcher();
  _fileWatcher.Path = "C:\\Folder";
  _fileWatcher.NotifyFilter = NotifyFilters.LastWrite;
  _fileWatcher.Filter = "Version.txt";
  _fileWatcher.Changed += new FileSystemEventHandler(OnChanged);
  _fileWatcher.EnableRaisingEvents = true;
}

private void OnChanged(object source, FileSystemEventArgs e)
{
   .......
}

I my case the Onchanged is called twice when I change the text file version.txt and save it.Please help.