/// <summary>
            /// Checks connection to current server and port
            /// </summary>
            /// <param name="server">server to connect</param>
            /// <param name="port">port to connect</param>
            /// <returns>connection success or not</returns>
            private void CheckConnection()
            {
                if (!_http)
                {
                    IPHostEntry hostEntry = null;
                    _result = false;
                    try
                    {
                        // Get host related information.
                        hostEntry = Dns.GetHostEntry(_server);

                        // Loop through the AddressList to obtain the supported AddressFamily. This is to avoid
                        // an exception that occurs when the host IP Address is not compatible with the address family
                        // (typical in the IPv6 case).
                        foreach (IPAddress address in hostEntry.AddressList)
                        {
                            IPEndPoint ipe = new IPEndPoint(address, _port);
                            Socket tempSocket =
                                new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp);

                            tempSocket.Connect(ipe);

                            if (tempSocket.Connected)
                            {
                                _result = true;
                                tempSocket.Close();
                            }
                        }
                    }
                    catch
                    {
                        _result = false;
                    }
                }
                else
                {
                    try
                    {
                        HttpWebRequest reqFP = (HttpWebRequest)HttpWebRequest.Create(_server);

                        HttpWebResponse rspFP = (HttpWebResponse)reqFP.GetResponse();
                        if (HttpStatusCode.OK == rspFP.StatusCode)
                        {
                            // HTTP = 200 - Internet connection available, server online
                            rspFP.Close();
                            _result = true;
                        }
                        else
                        {
                            // Other status - Server or connection not available
                            rspFP.Close();
                            _result = false;
                        }
                    }
                    catch (WebException)
                    {
                        // Exception - connection not available
                        _result = false;
                    }
                }
            }

        }