C# How can I test a file is a jpeg?

Question

Using C# how can I test a file is a jpeg? Should I check for a .jpg extension?

Thanks

Answer 1

Just take the media type of file and verify:

private bool isJpeg()
        {
string p = currFile.Headers.ContentType.MediaType;
            return p.ToLower().Equals("image/jpeg") || p.ToLower().Equals("image/pjpeg") || p.ToLower().Equals("image/png");
        }