protected async Task MapLoaded()
        {
            DisableAddButton = false;

            infobox = new InfoBox(new Geocoordinate(), new InfoboxOptions()
            {
                Visible         = false,
                Title           = "Position",
                ShowCloseButton = false,
                Offset          = new GeolocatonPoint {
                    X = 0, Y = 30
                }
            });

            if (!infoAttached)
            {
                await infobox.AttachMap(BingMapId);

                infoAttached = true;
            }
            StateHasChanged();
        }