C#

[DllImport("user32.dll")]
public static extern bool SetCursorPos(int X, int Y);
[DllImport("user32.dll")]
public static extern void mouse_event(long dwFlags, long dx, long dy, long cButtons, long dwExtraInfo);
[DllImport("user32.dll")]
public static extern IntPtr keybd_event(int key, int dummy, int flags, IntPtr info);

Fiddler has detected a protocol violation in session #XX.<br />
<br />
Protocol violation.  No Connection-Close, no Content-Length.  No way to tell if the response is complete.<br />

Transport
 -Location: http://192.168.1.15/maintenance/tools_system.htm

Entity
 -Content-Length: 0

Misc.
 -Server: RomPager/4.07 UPnP/1.0

POST http://192.168.1.15/Forms/tools_system_1
302 Found to http://192.168.1.15/maintenance/tools_system.htm

  HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://192.168.1.15/Forms/tools_system_1");
  request.Method = "POST";
  request.ProtocolVersion = HttpVersion.Version10;
  request.Credentials = new NetworkCredential("admin", password);
  request.UserAgent = "Opera/9.62 (Windows NT 6.0; U; en) Presto/2.1.1";
//  request.Headers["Host"] = "192.168.1.15";
  request.Accept = "text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1";
  request.Headers["Accept-Language"] = "en-IN,en;q=0.9";
  request.Headers["Accept-Charset"] = "iso-8859-1, utf-8, utf-16, *;q=0.1";
  request.Headers["Accept-Encoding"] = "deflate, gzip, x-gzip, identity, *;q=0";
  byte[] authBytes = Encoding.UTF8.GetBytes(("admin:" + password).ToCharArray());
  request.Headers["Authorization"] = "Basic " + Convert.ToBase64String(authBytes);
  request.Referer = "http://192.168.1.15/maintenance/tools_system.htm";

  request.KeepAlive = true;
  request.ContentLength = 32;
  request.ContentType = "application/x-www-form-urlencoded";

  byte[] postBytes = Encoding.ASCII.GetBytes("restoreFlag=0&RestartBtn=RESTART");

  Stream requestStream = request.GetRequestStream();  // << ERROR HERE
  requestStream.Write(postBytes, 0, 32);
  requestStream.Close();