protected override void BuildRenderTree(RenderTreeBuilder builder) { int seq = 0; var renderers = DocumentMetadataService.GetRenderers(NavigationManager.GetCurrentPageName()); if (renderers != null) { string tilteFormat = "{0}"; foreach (var renderer in renderers) { builder.AddContent(seq + 0, TabInsideHeadElement); if (renderer.IsTitleFormat) { tilteFormat = renderer.Value; } seq = renderer.Render(builder, seq + 1, tilteFormat); } } }