diff --git a/aspnetcore/tutorials/web-api-help-pages-using-swagger.md b/aspnetcore/tutorials/web-api-help-pages-using-swagger.md
index 40c7efdbf4..b31841bde4 100644
--- a/aspnetcore/tutorials/web-api-help-pages-using-swagger.md
+++ b/aspnetcore/tutorials/web-api-help-pages-using-swagger.md
@@ -223,6 +223,8 @@ See Visual Studio Code.
 
 ---
 
+Enabling XML comments provides debug information for undocumented public types and members. Undocumented types and members are indicated by the warning message: *Missing XML comment for publicly visible type or member*.
+
 Configure Swagger to use the generated XML file. For Linux or non-Windows operating systems, file names and paths can be case sensitive. For example, a *ToDoApi.XML* file would be found on Windows but not CentOS.
 
 [!code-csharp[Main](../tutorials/web-api-help-pages-using-swagger/sample/TodoApi/Startup.cs?name=snippet_ConfigureServices&highlight=20-22)]
diff --git a/aspnetcore/tutorials/web-api-help-pages-using-swagger/sample/TodoApi/Startup.cs b/aspnetcore/tutorials/web-api-help-pages-using-swagger/sample/TodoApi/Startup.cs
index e15e969ff7..34ac118f0f 100644
--- a/aspnetcore/tutorials/web-api-help-pages-using-swagger/sample/TodoApi/Startup.cs
+++ b/aspnetcore/tutorials/web-api-help-pages-using-swagger/sample/TodoApi/Startup.cs
@@ -1,4 +1,5 @@
-using System.IO;
+using System;
+using System.IO;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection;
@@ -9,7 +10,7 @@ using TodoApi.Models;
 namespace TodoApi
 {
     public class Startup
-    {       
+    {
         #region snippet_ConfigureServices
         public void ConfigureServices(IServiceCollection services)
         {
@@ -30,9 +31,9 @@ namespace TodoApi
                 });
 
                 // Set the comments path for the Swagger JSON and UI.
-                var basePath = PlatformServices.Default.Application.ApplicationBasePath;
+                var basePath = AppContext.BaseDirectory;
                 var xmlPath = Path.Combine(basePath, "TodoApi.xml"); 
-                c.IncludeXmlComments(xmlPath);                
+                c.IncludeXmlComments(xmlPath);
             });
         }
         #endregion