Improve messaging around .NET Upgrade Assistant (#49674)

* Alter include for upgrade assist; add to more articles

* Restructure deprecation notice to lead with key information (#49677)

* Initial plan

* Restructure deprecation notice to lead with key information

Co-authored-by: adegeo <67293991+adegeo@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: adegeo <67293991+adegeo@users.noreply.github.com>

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Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>

Author: adegeo

docs/core/porting/includes/github-copilot-suggestion.md

@@ -1,9 +1,9 @@
 ---
 author: adegeo
 ms.author: adegeo
-ms.date: 09/23/2025
+ms.date: 11/07/2025
 ms.topic: include
 ---
 
 > [!IMPORTANT]
-> Try the [GitHub Copilot app modernization chat agent](../github-copilot-app-modernization/overview.md). This agent analyzes your projects and dependencies, produces a step-by-step migration plan with targeted recommendations and automated code fixes, and commits each change so you can validate or roll back. It automates common porting tasks—updating project files, replacing deprecated APIs, and resolving build issues—so you can modernize faster with less manual effort. For more information, see [What is GitHub Copilot app modernization](../github-copilot-app-modernization/overview.md).
+> .NET Upgrade Assistant is officially deprecated. Use the [GitHub Copilot app modernization chat agent](../github-copilot-app-modernization/overview.md) instead, which is included with Visual Studio 2026 and Visual Studio 2022 17.14.16 or later. This agent analyzes your projects and dependencies, produces a step-by-step migration plan with targeted recommendations and automated code fixes, and commits each change so you can validate or roll back. It automates common porting tasks—updating project files, replacing deprecated APIs, and resolving build issues—so you can modernize faster with less manual effort.

docs/core/porting/upgrade-assistant-how-to-analyze.md

@@ -14,6 +14,8 @@ ms.date: 10/08/2024
 
 This article teaches you how to perform code analysis on your projects with .NET Upgrade Assistant, using Visual Studio or the terminal. The analysis generates a report that you can browse to get more information about the upgrade.
 
+[!INCLUDE [github-copilot-suggestion](includes/github-copilot-suggestion.md)]
+
 ## Prerequisites
 
 - For Visual Studio, see [Install .NET Upgrade Assistant - Visual Studio extension](upgrade-assistant-install.md#visual-studio-extension).

docs/core/porting/upgrade-assistant-how-to-upgrade.md

@@ -14,6 +14,8 @@ ms.date: 10/08/2024
 
 The focus of this article is to provide the basic steps to upgrade a project with .NET Upgrade Assistant. This involves initiating the upgrade and reviewing the results. Based on how complex your project is, you might be required to perform manual updates to your code.
 
+[!INCLUDE [github-copilot-suggestion](includes/github-copilot-suggestion.md)]
+
 Some project types have specific guidance on upgrading. For more information, see [Supported project types](upgrade-assistant-overview.md#supported-project-types).
 
 ## Prerequisites

docs/core/porting/upgrade-assistant-overview.md

@@ -22,22 +22,6 @@ ms.date: 10/08/2024
 
 .NET Upgrade Assistant includes an analysis engine that scans your projects and their dependencies. After the scan is complete, a report is generated with detailed information about performing an upgrade. You can use this information to upgrade either the entire project or specific parts of the project.
 
-<!-- I don't have this information ready yet
-
-## Extensibility
-
-One key feature of .NET Upgrade Assistant is designing upgrade extensions for your own libraries. Upgrade extensions can be made up of one or two upgrades:
-
-- Package Map
-
-  This is something.
-
-- API Map
-
-  This is something.
-
--->
-
 ## Supported project types
 
 .NET Upgrade Assistant supports upgrading projects coded in either C# or Visual Basic. The following types of projects are supported:

docs/core/porting/upgrade-assistant-telemetry.md

@@ -8,6 +8,8 @@ ms.date: 05/22/2023
 
 The [Upgrade Assistant](./upgrade-assistant-overview.md) includes a telemetry feature that collects usage data. The telemetry data is used to help understand how to make improvements to the tool.
 
+[!INCLUDE [github-copilot-suggestion](includes/github-copilot-suggestion.md)]
+
 ## How to opt out
 
 The Upgrade Assistant telemetry feature is enabled by default. To opt out of the telemetry feature, set the `DOTNET_UPGRADEASSISTANT_TELEMETRY_OPTOUT` environment variable to `1` or `true`.

docs/core/porting/upgrade-assistant-wcf.md

@@ -14,6 +14,8 @@ The .NET Upgrade Assistant is a command-line tool that can assist with upgrading
 - A demonstration of how to run the tool against a WCF Server-side project on .NET Framework.
 - Troubleshooting tips.
 
+[!INCLUDE [github-copilot-suggestion](includes/github-copilot-suggestion.md)]
+
 ## Things to know before starting
 
 This tool currently supports C# projects and uses [CoreWCF](https://github.com/corewcf/corewcf) to port self-hosted WCF Server-side projects to .NET 6.