Rebuild sidebar, How?

Radzen.Blazor Components
1

Hello.
My sidebar menu items are filled in from the database.
After adding a new entry to the database, I need to rebuild the sidebar. How? )

sidebar:


<RadzenSidebar @ref="sidebar0">
    <RadzenPanelMenu Style=" min-height: 150px">

        @{ if (_localityList != null)
            {
                foreach (var itemLocality in _localityList)
                {
                    <RadzenPanelMenuItem Icon="view_headline" Text=@itemLocality.Name @ondblclick="@((args)=>EditLocalityClick(args,itemLocality.Guid))">
                        @{ if (_partnerList != null)
                            {
                                foreach (var itemPartner in _localityList)
                                {
                                    <RadzenPanelMenuItem Icon="add" Text=@itemPartner.Name @onclick="@((args)=>EditPartnerClick(args,itemLocality.Guid))"></RadzenPanelMenuItem>
                                }

                            }
                        }
                        <RadzenPanelMenuItem Icon="add" Text="New partner..." @onclick="@AddPartnerClick"></RadzenPanelMenuItem>
                    </RadzenPanelMenuItem>
                }
            }
        }
        <RadzenPanelMenuItem Icon="add" Text="New territory..." @onclick="@AddLocalityClick"></RadzenPanelMenuItem>
    </RadzenPanelMenu>
</RadzenSidebar>
2

You need to somehow update the localityList field and call StateHasChanged

3 
            _localityList = await _repoService.GetLocality();
            await InvokeAsync(() => { StateHasChanged(); });

this is implemented. but the rebuild doesn't happen.

update:
sorry, I found an error. StateHasChanged() works.