How to read image from []byte or MemoryStream

hi,
I have a question that I don't know how to read a image from []byte or MemoryStream.
this is my code:

Code:

---

    private void OutPutValidateImage(HttpResponse response)
    {
        Modules.Captcha c = new Modules.Captcha();
        c.Width = 120;
        c.Height = 40;
        c.AutoWidth = true;
        c.Type = Modules.CaptchaType.CharacterAndNumbers;
        c.RandomTextColor = true;
        c.RandomBackgroundNoiseColor = true;
        byte[] binaryDatas = c.GenerateGraphic();
        response.ClearContent();
        response.ContentType = "image/Gif";
        response.BinaryWrite(binaryDatas);
    }

---

but Reminder error that 'OutputStream is not available when a custom TextWriter is used.'

anyone can help me ?
thx~