Bitmap (Stream stream)

Your stream is already in use.

If you put a variable like a stream inside a foreach loop then that is a new variable each time it iterates.

I would consider something more like:

  private List<string> FileList = new List<string>();
  private void LoopFiles()
  {
      foreach(string path in FileList)
      {
          Image img = LoadImage(path);
          System.Console.WriteLine(img.Width + " " + img.Height);
      }
  }

  private Image LoadImage(string path)
  {
      var ms = new MemoryStream(File.ReadAllBytes(path)); 
      return Image.FromStream(ms);
  }

Obviously, you need to fill FileList with a list of file paths.

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Hope that helps

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