public async Task <IActionResult> NewLocationAsync(Location loc)
        {
            //handling user-may-occur mistakes
            if (loc.city == null && loc.country == null && loc.geographic_latitude == null && loc.geographic_longitude == null && loc.airborne == null)
            {
                return(View(loc));

                ViewData["Message"] = "Please fill at least airborne area or Country, City, Geographic Latitude and Geographic Longitude areas";
            }

            //If the location name is null we give a default name that specifies its country, city and area number
            String def_name = null;

            if (String.IsNullOrEmpty(loc.name))
            {
                if (loc.city == null && loc.country == null && loc.geographic_latitude == null && loc.geographic_longitude == null && loc.airborne != null)
                {
                    int count = 0;

                    try
                    {
                        count = await _session.GetLocationName(loc.airborne);
                    }
                    catch (Exception e)
                    {
                        // log exception here
                        ViewData["Message"] = e.Message.ToString() + " Error";
                        await _session.Rollback();
                    }
                    finally
                    {
                        _session.CloseTransaction();
                    }
                    count    = count + 1;
                    def_name = loc.airborne + " " + count;
                }
                else if (loc.city != null && loc.country != null && loc.geographic_latitude != null && loc.geographic_longitude != null)
                {
                    int count = 0;

                    try
                    {
                        count = await _session.GetLocationName(loc.country, loc.city);
                    }
                    catch (Exception e)
                    {
                        // log exception here
                        ViewData["Message"] = e.Message.ToString() + " Error";
                        await _session.Rollback();
                    }
                    finally
                    {
                        _session.CloseTransaction();
                    }
                    count    = count + 1;
                    def_name = loc.country + " " + loc.city + " " + count;
                }
                else
                {
                    ViewData["Message"] = "Please fill at least airborne area or Country, City, Geographic Latitude and Geographic Longitude areas";
                    return(View(loc));
                }
            }
            else
            {
                def_name = loc.name;
            }
            //end of naming////////////////////////////////////////////////////////////////////////////////

            //get session id (we will use it when updating data and handling errors)
            sessionID_s = HttpContext.Session.GetString("Session");
            sessionID   = Guid.Parse(sessionID_s);
            Data current = new Data();

            Program.data.TryGetValue(sessionID, out current);

            //control if current did not came
            if (current == null)
            {
                ViewData["Message"] = "Error occured please restart the program";
                return(View(loc));
            }

            //defining Radar's and Location's key here
            Guid key_location = Guid.NewGuid();
            Guid key          = Guid.NewGuid();

            current.Radar.ID = key;

            //rename Radar, Transmitter and Antennas again
            String radar_name = current.Radar.name;

            if (current.Radar.Isnamed == true)
            {
                radar_name         = "Radar in " + def_name;
                current.Radar.name = radar_name;
            }

            if (current.Transmitter.Isnamed == true)
            {
                Guid   id      = current.Transmitter.ID;
                String newName = radar_name + "'s Transmitter";
                current.Transmitter.name = newName;
                try
                {
                    _session.BeginTransaction();
                    _session.RenameTransmitter(id, newName);
                    await _session.Commit();
                }
                catch (Exception e)
                {
                    // log exception here
                    ViewData["Message"] = e.Message.ToString() + " Error";
                    await _session.Rollback();

                    return(View(loc));
                }
                finally
                {
                    _session.CloseTransaction();
                }
            }

            if (current.Receiver.Isnamed == true)
            {
                Guid   id      = current.Receiver.ID;
                String newName = radar_name + "'s Receiver";
                current.Receiver.name = newName;
                try
                {
                    _session.BeginTransaction();
                    _session.RenameReceiver(id, newName);
                    await _session.Commit();
                }
                catch (Exception e)
                {
                    // log exception here
                    ViewData["Message"] = e.Message.ToString() + " Error";
                    await _session.Rollback();

                    return(View(loc));
                }
                finally
                {
                    _session.CloseTransaction();
                }
            }

            Location location_temp = new Location(key_location, def_name, loc.country, loc.city, loc.geographic_latitude, loc.geographic_longitude, loc.airborne);
            Radar    radar_temp    = new Radar(key, radar_name, current.Radar.system, current.Radar.configuration, current.Transmitter.ID, current.Receiver.ID, key_location);

            current.Radar = radar_temp;
            //we do not need location in current because we will not use its informations

            try
            {
                _session.BeginTransaction();
                await _session.SaveLocation(location_temp);

                await _session.SaveRadar(radar_temp);

                await _session.Commit();

                current.message = "Both records (Location and Radar) saved to the db";
                Program.data.Remove(sessionID);
                Program.data.Add(sessionID, current);
                return(RedirectToAction("NewMode", "Mode"));
            }
            catch (Exception e)
            {
                // log exception here
                ViewData["Message"] = e.Message.ToString() + " Error";
                await _session.Rollback();

                return(View(loc));
            }
            finally
            {
                _session.CloseTransaction();
            }
        }