AnyPlace.MainPage.navigate C# (CSharp) Method

        private void navigate()
        {
            if (Mymap.Layers.Contains(floorPoisDetail))
            {
                floorPoisDetail.Clear();
                Mymap.Layers.Remove(floorPoisDetail);
            }

            if (Mymap.Layers.Contains(_sourceLayer))
                Mymap.Layers.Remove(_sourceLayer);

            if (_locationManager.Status != GeoPositionStatus.Ready && !_externalSource && !_sourcePoi)
            {
                //MessageBox.Show("No location services found. Please enable location services and try again!");
                if (Mymap.Layers.Contains(floorPoisDetail))
                    Mymap.Layers.Remove(floorPoisDetail);
            }
            else
            {
                if (to_entrance)
                {
                    Mymap.Layers.Remove(mapHoldLayer);

                    ApplicationBar.IsVisible = false;
                    MoveViewWindow(-70);
                    stackpanelOpen();
                    directions_grid.Visibility = Visibility.Visible;
                    calcProgrBar.Visibility = Visibility.Visible;
                    time.Visibility = Visibility.Collapsed;
                    distance.Visibility = Visibility.Collapsed;
                    calcProgrBar.IsIndeterminate = true;
                    GetNavigationRoute(entrance_location);
                    Mymap.SetView(entrance_location, 20, MapAnimationKind.Parabolic);
                    return;
                }
                else
                {
                    if (start_nav && intobuilding())
                    {
                        Mymap.MapElements.Clear();
                        GetNavigationRoutesBuilding(_selectedBuild, _floorPoiTo, _selectedFloor, _myLatitude.ToString(CultureInfo.InvariantCulture),
                        _myLongitude.ToString(CultureInfo.InvariantCulture));
                        return;
                    }

                }
                if (_searchBuilding && into_selectedbuiding())
                {
                    _searchBuilding = false;
                }


                // if we are into the building and no source poi set get navigations route from location to poi
                if (_tileLoaded && !_sourcePoi && !_externalSource && !_searchBuilding)
                {
                    Mymap.MapElements.Clear();
                    GetNavigationRoutesBuilding(_selectedBuild, _floorPoiTo, _selectedFloor, _myLatitude.ToString(CultureInfo.InvariantCulture),
                        _myLongitude.ToString(CultureInfo.InvariantCulture));

                }
                else
                {
                    // if we set source poi get navigations route from source poi else get all routes
                    if (_sourcePoi)
                        BuildingSourcePoi();
                    else
                    {
                        NavigateToFloorPoi();
                    }
                }
            }
        }