реализация асинхронного метода формулы

Functions.cs

@@ -5,10 +5,15 @@ namespace Rehau.Sku.Assist
     public class Functions : IExcelAddIn
     {
         [ExcelFunction(description: "Получение наименования и артикула позиции")]
-        public static string RAUNAME(string request)
+        public static object RAUNAME(string request)
         {
             SkuAssist.EnsureHttpInitialized();
-            return SkuAssist.GetSku(request);
+
+            return ExcelTaskUtil.Run("RAUNAME ASYNC", request, async token =>
+            {
+                var document = await SkuAssist.GetDocumentAsync(request);
+                return SkuAssist.GetResultFromDocument(document);
+            });
         }
 
         public void AutoClose()

SkuAssist.cs

@@ -18,38 +18,33 @@ namespace Rehau.Sku.Assist
             }
         }
 
-        public static string GetSku(string request)
+        public async static Task<AngleSharp.Dom.IDocument> GetDocumentAsync(string request)
         {
             string url = "https://shop-rehau.ru/catalogsearch/result/?q=" + request;
-            HttpResponseMessage response = GetResponse(url).Result;
-            var document = GetDocument(response).Result;
 
-            var name = document
-                .All
-                .Where(e => e.ClassName == "product-item__desc-top")
-                .Select(e => new { sku = e.Children[0].TextContent, name = e.Children[1].TextContent.Trim(new[] { '\n', ' ' }) })
-                .Where(t => !t.sku.Any(c => char.IsLetter(c)))
-                .FirstOrDefault();
-
-            return name == null ? "Не найдено" : $"{name.name} ({name.sku})";
-        }
-
-        private static async Task<HttpResponseMessage> GetResponse(string url)
-        {
             ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
             HttpResponseMessage response = await _httpClient.GetAsync(url);
             response.EnsureSuccessStatusCode();
-            return response;
-        }
 
-        private static async Task<AngleSharp.Dom.IDocument> GetDocument(HttpResponseMessage response)
+
-        {
             IConfiguration config = Configuration.Default;
             IBrowsingContext context = BrowsingContext.New(config);
 
             string source = await response.Content.ReadAsStringAsync();
             return await context.OpenAsync(req => req.Content(source));
         }
+
+        public static string GetResultFromDocument(AngleSharp.Dom.IDocument document)
+        {
+            var result = document
+                .All
+                .Where(e => e.ClassName == "product-item__desc-top")
+                .Select(e => new { sku = e.Children[0].TextContent, title = e.Children[1].TextContent.Trim(new[] { '\n', ' ' }) })
+                .Where(t => !t.sku.Any(c => char.IsLetter(c)))
+                .FirstOrDefault();
+
+            return result == null ? "Не найдено" : $"{result.title} ({result.sku})";
+        }
     }
 }