Microsoft.AspNetCore.Mvc.Components.Prerendering

 {
+    namespace Microsoft.AspNetCore.Mvc.Rendering {
+        public static class HtmlHelperComponentPrerenderingExtensions {
+            public static Task<IHtmlContent> RenderComponentAsync<TComponent>(this IHtmlHelper htmlHelper) where TComponent : IComponent;
+            public static Task<IHtmlContent> RenderComponentAsync<TComponent>(this IHtmlHelper htmlHelper, object parameters) where TComponent : IComponent;
+        }
+    }
+}