Creating a valid file name in C#

This was new to me so I thought I’d share. If you want to generate a file name based on some text, but that text may contain characters that aren’t allowed in file names, what to do? In the past, I’ve fumbled around, replacing invalid characters as bugs have presented themselves. But there is a much more robust way, once I noticed the Path.GetInvalidFileNameChars method. That led to this very simple method.

    private string ReplaceInvalidFileNameChars(string fileName)
    {
      foreach (char invalidChar in Path.GetInvalidFileNameChars())
      {
        fileName = fileName.Replace(invalidChar, '_');
      }

      return fileName;
    }