diff --git a/docfx.json b/docfx.json
index c38e0b0b8ba43..9d5ee8ed87039 100644
--- a/docfx.json
+++ b/docfx.json
@@ -90,7 +90,8 @@
                     "Compiler Breaking Changes - DotNet 7.md",
                     "Compiler Breaking Changes - DotNet 8.md",
                     "Compiler Breaking Changes - DotNet 9.md",
-                    "Compiler Breaking Changes - DotNet 10.md"
+                    "Compiler Breaking Changes - DotNet 10.md",
+                    "Deviations from Standard.md"
                 ],
                 "src": "_roslyn/docs/compilers/CSharp",
                 "dest": "csharp/whats-new/breaking-changes",
@@ -534,6 +535,7 @@
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 8.md": "11/08/2023",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 9.md": "11/09/2024",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 10.md": "01/09/2024",
+                "_roslyn/docs/compilers/CSharp/Deviations from Standard.md": "04/24/2025",
                 "_vblang/spec/*.md": "07/21/2017"
             },
             "ms.subservice": {
@@ -715,6 +717,7 @@
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 8.md": "C# compiler breaking changes since C# 11",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 9.md": "C# compiler breaking changes since C# 12",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 10.md": "C# compiler breaking changes since C# 13",
+                "_roslyn/docs/compilers/CSharp/Deviations from Standard.md": "Deviations from the C# standard",
                 "_vblang/spec/introduction.md": "Introduction",
                 "_vblang/spec/lexical-grammar.md": "Lexical grammar",
                 "_vblang/spec/preprocessing-directives.md": "Preprocessing directives",
@@ -837,12 +840,13 @@
                 "_csharplang/proposals/csharp-14.0/user-defined-compound-assignment.md": "This proposal introduces user-defined compound assignment operators. Developers can override compound assignment, increment, and decrement operators.",
                 "_csharplang/proposals/csharp-14.0/ignored-directives.md": "This proposal allows a source file to include ignored directives. In most cases, ignored directives are used for file-based apps, for example `#!`",
                 "_csharplang/proposals/csharp-14.0/extension-operators.md": "This proposal extends the proposal for extensions to include *extension operators*, where an operator can be an extension member.",
-                "_csharplang/proposals/csharp-14.0/named-and-optional-parameters-in-expression-trees.md": "This proposal allows an expression tree to include named and optional parameters. This enables expression trees to be more flexible in how they are constructed.",
+                "_csharplang/proposals/csharp-14.0/optional-and-named-parameters-in-expression-trees.md": "This proposal allows an expression tree to include named and optional parameters. This enables expression trees to be more flexible in how they are constructed.",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 7.md": "Learn about any breaking changes since the initial release of C# 10 and included in C# 11",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 8.md": "Learn about any breaking changes since the initial release of C# 11 and included in C# 12",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 9.md": "Learn about any breaking changes since the initial release of C# 12 and included in C# 13",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 10.md": "Learn about any breaking changes since the initial release of C# 13 and included in C# 14",
-                "_vblang/spec/introduction.md": "This chapter provides and introduction to the Visual Basic language.",
+                "_roslyn/docs/compilers/CSharp/Deviations from Standard.md": "Learn about any deviations from the C# standard",
+                "_vblang/spec/introduction.md": "This chapter provides an overview of the Visual Basic language and its design goals.",
                 "_vblang/spec/lexical-grammar.md": "This chapter defines the lexical grammar for Visual Basic.",
                 "_vblang/spec/preprocessing-directives.md": "This chapter defines the preprocessing directives allowed in Visual Basic",
                 "_vblang/spec/general-concepts.md": "This chapter describes the general concepts used in the Visual Basic language.",
@@ -900,7 +904,11 @@
                 "docs/visual-basic/**/*.md": "Visual Basic"
             },
             "open_to_public_contributors": {
-                "docs/standard/design-guidelines/**.md": false
+                "docs/standard/design-guidelines/**.md": false,
+                "_csharplang/**.md": false,
+                "_csharpstandard/**.md": false,
+                "_roslyn/**.md": false,
+                "_vblang/**.md": false
             },
             "ms.collection": {
                 "docs/ai/**/**.{md,yml}": "ce-skilling-ai-copilot"
diff --git a/docs/csharp/specification/toc.yml b/docs/csharp/specification/toc.yml
index 3de2c6bf0a33f..662b4a23038f5 100644
--- a/docs/csharp/specification/toc.yml
+++ b/docs/csharp/specification/toc.yml
@@ -247,6 +247,8 @@ items:
       href: ../../../_csharplang/proposals/csharp-11.0/generic-attributes.md
     - name: Experimental attribute
       href: ../../../_csharplang/proposals/csharp-12.0/experimental-attribute.md
+- name: Deviations from the C# standard
+  href: ../../../_roslyn/docs/compilers/CSharp/Deviations from Standard.md
 - name: Other C# documentation
   items:
   - name: C# conceptual docs