Get Image from IP Camera using C#

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C#

Hello buddy
Currently i am working on a project related to IP Camera (Bosch). I can access the camera using web browser with ip address (ex: http://10.64.91.48). Now i want to display the video on a Window Form. Searching on the internet many times and using below code but i face an ArgumentException, and still can't resolve it. I try to get the content type from response (resp.ContentType), it show me text/html.
Could you please help me to resolve this issue? Any feedback will be very appreciated!

string CameraUrl = this.txt_URL.Text;
            if (string.IsNullOrEmpty(CameraUrl) == false)
            {
                byte [] buffer=new byte[300000];
                int read, total = 0;
                //Create a HTTP Request
                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(CameraUrl);
                //Request Credential
                req.Credentials = new NetworkCredential("user", "user");
                //Get Response
                WebResponse resp = req.GetResponse();               
                //Get Response Stream
                Stream stream = resp.GetResponseStream();
                //Read data from stream
                while ((read = stream.Read(buffer, total, 1000)) != 0)
                {
                    total += read;
                }
                //Get Bitmap
                MemoryStream memstream = new MemoryStream(buffer, 0, total);
               
                Bitmap img = (Bitmap)Bitmap.FromStream(memstream); // Exception here
                this.pictureBox1.Image = img;
            }