Add C# Dev Kit IntelliSense guidance to VS Code tab in "Add a new field" tutorial (#36797)

* Initial plan

* Fix empty VS Code tab in Add a new field tutorial (issue #20392)

Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>

* Apply suggestions from code review

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: wadepickett <10985336+wadepickett@users.noreply.github.com>
Co-authored-by: Wade Pickett <wpickett@microsoft.com>

Author: Copilot

aspnetcore/tutorials/first-mvc-app/new-field.md

@@ -1,10 +1,11 @@
 ---
 title: Part 8, add a new field to an ASP.NET Core MVC app
+ai-usage: ai-assisted
 author: wadepickett
 description: Part 8 of tutorial series on ASP.NET Core MVC.
 monikerRange: '>= aspnetcore-3.1'
 ms.author: wpickett
-ms.date: 01/22/2026
+ms.date: 02/24/2026
 uid: tutorials/first-mvc-app/new-field
 ---
 # Part 8, add a new field to an ASP.NET Core MVC app
@@ -66,7 +67,9 @@ You can copy/paste the previous "form group" and let intelliSense help you updat
 
 # [Visual Studio Code](#tab/visual-studio-code)
 
-:::image type="content" source="~/tutorials/first-mvc-app/new-field/media/vscode-update-form.png" alt-text="Updating the existed form by inserting the new field Rating.":::
+You can copy/paste the previous "form group" and let IntelliSense help you update the fields. IntelliSense works with [Tag Helpers](xref:mvc/views/tag-helpers/intro). The [C# Dev Kit](https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csdevkit) extension provides IntelliSense support in Visual Studio Code.
+
+:::image type="content" source="~/tutorials/first-mvc-app/new-field/media/vscode-update-form.png" alt-text="Updating the existing form by inserting the new field Rating.":::
 
 ---
 

aspnetcore/tutorials/first-mvc-app/new-field/includes/new-field8.md

@@ -54,7 +54,9 @@ You can copy/paste the previous "form group" and let intelliSense help you updat
 
 # [Visual Studio Code](#tab/visual-studio-code)
 
-![Updating the existed form by inserting the new field "Rating".](~/tutorials/first-mvc-app/new-field/_static/VSCode-UpdatingForm.png)
+You can copy/paste the previous "form group" and let IntelliSense help you update the fields. IntelliSense works with [Tag Helpers](xref:mvc/views/tag-helpers/intro). The [C# Dev Kit](https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csdevkit) extension provides IntelliSense support in Visual Studio Code.
+
+![Updating the existing form by inserting the new field "Rating".](~/tutorials/first-mvc-app/new-field/_static/VSCode-UpdatingForm.png)
 
 ---
 

aspnetcore/tutorials/first-mvc-app/new-field/includes/new-field9.md

@@ -47,13 +47,15 @@ Update the `/Views/Movies/Create.cshtml` with a `Rating` field.
 
 # [Visual Studio](#tab/visual-studio)
 
-You can copy/paste the previous "form group" and let intelliSense help you update the fields. IntelliSense works with [Tag Helpers](xref:mvc/views/tag-helpers/intro).
+You can copy/paste the previous "form group" and let IntelliSense help you update the fields. IntelliSense works with [Tag Helpers](xref:mvc/views/tag-helpers/intro).
 
 ![The developer has typed the letter R for the attribute value of asp-for in the second label element of the view. An Intellisense contextual menu has appeared showing the available fields, including Rating, which is highlighted in the list automatically. When the developer clicks the field or presses Enter on the keyboard, the value will be set to Rating.](~/tutorials/first-mvc-app/new-field/_static/9/cr-VS22-17.11.0.png)
 
 # [Visual Studio Code](#tab/visual-studio-code)
 
-![Updating the existed form by inserting the new field "Rating".](~/tutorials/first-mvc-app/new-field/_static/9/VSCode-UpdatingForm9.png)
+You can copy/paste the previous "form group" and let IntelliSense help you update the fields. IntelliSense works with [Tag Helpers](xref:mvc/views/tag-helpers/intro). The [C# Dev Kit](https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csdevkit) extension provides IntelliSense support in Visual Studio Code.
+
+![Updating the existing form by inserting the new field "Rating".](~/tutorials/first-mvc-app/new-field/_static/9/VSCode-UpdatingForm9.png)
 
 ---