title: Which filter of FileSystemWatcher do I need to use for finding new files
body: <p>So far I know that FileSystemWatcher can look into a folder and if any of the files inside that folder is changed,modifies,.etc... then we can handle it.
  But I am not sure which filter and event I should use in my scenario:  Watch for a Folder, If a file is added to that folder, do XYZ ... So In my scenario I don't care if an existing file is changed,etc..those should be ignored...only do XYZ if and only if a new file has been added to that Folder...</p>
  
  <p>Which event and filter do you recommended for this scenario? </p>