Detecting errors in PNG image

Here is the image in question:

Here is the image in question:

Here is the image in question:

This might do it.

[code]
        private static bool IsImageValid(string fileFullPath)
        {
            Bitmap bitmap = null;
            try
            {
                if (!string.IsNullOrEmpty(fileFullPath) &&
                    File.Exists(fileFullPath))
                {
                    bitmap =
                        new Bitmap(fileFullPath);
                    Image image = bitmap;
                    try
                    {
                        bool isValid = true;
                        if (bitmap.Height > 0 &&
                            bitmap.Width > 0)
                        {
                            Color color =
                                bitmap.GetPixel(
                                bitmap.Width-1,
                                bitmap.Height - 1);
                            if (color.Name.Equals("0"))
                            {
                                isValid = false;
                            }
                        }
                        bitmap.Dispose();
                        return isValid;
                    }
                    catch
                    {
                    }
                }
            }
            catch
            {
            }
            return false;
        }
[/code]