Merge pull request #34088 from dotnet/main

Author: guardrex

.openpublishing.publish.config.json

@@ -63,6 +63,13 @@
       "url": "https://github.com/dotnet/AspNetCore.Docs.Samples",
       "branch": "main",
       "branch_mapping": {}
+    },
+    {
+      "path_to_root": "_razor",
+      "url": "https://github.com/dotnet/razor",
+      "branch": "main",
+      "include_in_build": true,
+      "branch_mapping": {}
     }
   ],
   "branch_target_mapping": {

aspnetcore/docfx.json

@@ -6,6 +6,16 @@
         "exclude": [ "**/includes/**", "***/license.md", "**/obj/**", "***/readme.md", "**/sample/**", "**/samples/**", "_site/**" ], 
         "group": "group1", 
         "src": "."
+      },
+      {
+        "files": [
+            "Compiler Breaking Changes - DotNet 8.md",
+            "Compiler Breaking Changes - DotNet 9.md"
+        ],
+        "exclude": [],
+        "group": "group1", 
+        "src": "../_razor/docs",
+        "dest": "_razor/docs"
       }
     ],
     "resource": [

aspnetcore/includes/not-latest-version.md

@@ -1,17 +1,17 @@
-:::moniker range="< aspnetcore-8.0"
+:::moniker range="< aspnetcore-9.0"
 > [!NOTE]
-> This isn't the latest version of this article. For the current release, see the [.NET 8 version of this article](?view=aspnetcore-8.0&preserve-view=true).
+> This isn't the latest version of this article. For the current release, see the [.NET 9 version of this article](?view=aspnetcore-9.0&preserve-view=true).
 :::moniker-end
 
 :::moniker range="= aspnetcore-7.0 || = aspnetcore-5.0 || = aspnetcore-3.0 || = aspnetcore-3.1 || = aspnetcore-2.0"
 [!INCLUDE[](~/includes/out-of-support.md)]
 :::moniker-end
 
-:::moniker range="> aspnetcore-8.0"
+:::moniker range="> aspnetcore-9.0"
 > [!IMPORTANT]
 > This information relates to a pre-release product that may be substantially modified before it's commercially released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
 >
-> For the current release, see the [.NET 8 version of this article](?view=aspnetcore-8.0&preserve-view=true).
+> For the current release, see the [.NET 9 version of this article](?view=aspnetcore-9.0&preserve-view=true).
 :::moniker-end
 
 <!--

aspnetcore/toc.yml

@@ -799,6 +799,10 @@ items:
             uid: mvc/controllers/filters
           - name: Razor SDK
             uid: razor-pages/sdk
+          - name: Razor breaking changes since .NET 8
+            href: ../_razor/docs/Compiler%20Breaking%20Changes%20-%20DotNet%208.md
+          - name: Razor breaking changes since .NET 9
+            href: ../_razor/docs/Compiler%20Breaking%20Changes%20-%20DotNet%209.md
           - name: View components
             uid: mvc/views/view-components
           - name: View compilation