promote the standard in TOC

docs/breadcrumb/toc.yml

@@ -439,27 +439,32 @@ items:
         - name: Compiler messages
           tocHref: /dotnet/csharp/language-reference/compiler-messages/
           topicHref: /dotnet/csharp/language-reference/compiler-messages/index
+        - name: Compiler messages
+          tocHref: /dotnet/csharp/misc
+          topicHref: /dotnet/csharp/language-reference/compiler-messages/index
+      - name: Specification
+        items:    
         - name: C# 6.0 draft specification
           tocHref: /dotnet/csharp/language-reference/language-specification/
           topicHref: /dotnet/csharp/language-reference/language-specification/index
-        - name: C# 7.0 language proposals
+        - name: C# 7.0 feature specifications
           tocHref: /dotnet/csharp/language-reference/proposals/csharp-7.0/
           topicHref: /dotnet/csharp/language-reference/proposals/csharp-7.0/index
-        - name: C# 7.1 language proposals
+        - name: C# 7.1 feature specifications
           tocHref: /dotnet/csharp/language-reference/proposals/csharp-7.1/
           topicHref: /dotnet/csharp/language-reference/proposals/csharp-7.1/index
-        - name: C# 7.2 language proposals
+        - name: C# 7.2 feature specifications
           tocHref: /dotnet/csharp/language-reference/proposals/csharp-7.2/
           topicHref: /dotnet/csharp/language-reference/proposals/csharp-7.2/index
-        - name: C# 7.3 language proposals
+        - name: C# 7.3 feature specifications
           tocHref: /dotnet/csharp/language-reference/proposals/csharp-7.3/
           topicHref: /dotnet/csharp/language-reference/proposals/csharp-7.3/index
-        - name: C# 8.0 language proposals
+        - name: C# 8.0 feature specifications
           tocHref: /dotnet/csharp/language-reference/proposals/csharp-8.0/
           topicHref: /dotnet/csharp/language-reference/proposals/csharp-8.0/index
-        - name: Compiler messages
-          tocHref: /dotnet/csharp/misc
-          topicHref: /dotnet/csharp/language-reference/compiler-messages/index
+        - name: C# 9.0 feature specifications
+          tocHref: /dotnet/csharp/language-reference/proposals/csharp-9.0/
+          topicHref: /dotnet/csharp/language-reference/proposals/csharp-9.0/index
     - name: F# guide
       tocHref: /dotnet/fsharp/
       topicHref: /dotnet/fsharp/index

docs/csharp/toc.yml

@@ -1355,7 +1355,169 @@ items:
       href: language-reference/compiler-options/advanced.md
   - name: Compiler messages
     href: language-reference/compiler-messages/index.md
+- name: Specifications
+  items:
   - name: C# 6.0 draft specification
-    href: language-reference/specification/
-  - name: C# 7.0 - 9.0 proposals
-    href: language-reference/proposals/
+    items:
+    - name: Introduction
+      href: ../../_csharplang/spec/introduction.md
+    - name: Lexical structure
+      href: ../../_csharplang/spec/lexical-structure.md
+    - name: Basic concepts
+      href: ../../_csharplang/spec/basic-concepts.md
+    - name: Types
+      href: ../../_csharplang/spec/types.md
+    - name: Variables
+      href: ../../_csharplang/spec/variables.md
+    - name: Conversions
+      href: ../../_csharplang/spec/conversions.md
+    - name: Expressions
+      href: ../../_csharplang/spec/expressions.md
+    - name: Statements
+      href: ../../_csharplang/spec/statements.md
+    - name: Namespaces
+      href: ../../_csharplang/spec/namespaces.md
+    - name: Classes
+      href: ../../_csharplang/spec/classes.md
+    - name: Structs
+      href: ../../_csharplang/spec/structs.md
+    - name: Arrays
+      href: ../../_csharplang/spec/arrays.md
+    - name: Interfaces
+      href: ../../_csharplang/spec/interfaces.md
+    - name: Enums
+      href: ../../_csharplang/spec/enums.md
+    - name: Delegates
+      href: ../../_csharplang/spec/delegates.md
+    - name: Exceptions
+      href: ../../_csharplang/spec/exceptions.md
+    - name: Attributes
+      href: ../../_csharplang/spec/attributes.md
+    - name: Unsafe code
+      href: ../../_csharplang/spec/unsafe-code.md
+    - name: Documentation comments
+      href: ../../_csharplang/spec/documentation-comments.md
+  - name: C# 7.0 - 9.0 features
+    items:
+    - name: C# 7.0 features
+      items:
+      - name: Pattern matching
+        href: ../../_csharplang/proposals/csharp-7.0/pattern-matching.md
+      - name: Local functions
+        href: ../../_csharplang/proposals/csharp-7.0/local-functions.md
+      - name: Out variable declarations
+        href: ../../_csharplang/proposals/csharp-7.0/out-var.md
+      - name: Throw expressions
+        href: ../../_csharplang/proposals/csharp-7.0/throw-expression.md
+      - name: Binary literals
+        href: ../../_csharplang/proposals/csharp-7.0/binary-literals.md
+      - name: Digit separators
+        href: ../../_csharplang/proposals/csharp-7.0/digit-separators.md
+      - name: Async task types
+        href: ../../_csharplang/proposals/csharp-7.0/task-types.md
+    - name: C# 7.1 features
+      items:
+      - name: Async main method
+        href: ../../_csharplang/proposals/csharp-7.1/async-main.md
+      - name: Default expressions
+        href: ../../_csharplang/proposals/csharp-7.1/target-typed-default.md
+      - name: Infer tuple names
+        href: ../../_csharplang/proposals/csharp-7.1/infer-tuple-names.md
+      - name: Pattern matching with generics
+        href: ../../_csharplang/proposals/csharp-7.1/generics-pattern-match.md
+    - name: C# 7.2 features
+      items:
+      - name: Readonly references
+        href: ../../_csharplang/proposals/csharp-7.2/readonly-ref.md
+      - name: Compile-time safety for ref-like types
+        href: ../../_csharplang/proposals/csharp-7.2/span-safety.md
+      - name: Non-trailing named arguments
+        href: ../../_csharplang/proposals/csharp-7.2/non-trailing-named-arguments.md
+      - name: Private protected
+        href: ../../_csharplang/proposals/csharp-7.2/private-protected.md
+      - name: Conditional ref
+        href: ../../_csharplang/proposals/csharp-7.2/conditional-ref.md
+      - name: Leading digit separator
+        href: ../../_csharplang/proposals/csharp-7.2/leading-separator.md
+    - name: C# 7.3 features
+      items:
+      - name: Unmanaged generic type constraints
+        href: ../../_csharplang/proposals/csharp-7.3/blittable.md
+      - name: Indexing `fixed` fields should not require pinning regardless of the movable/unmovable context
+        href: ../../_csharplang/proposals/csharp-7.3/indexing-movable-fixed-fields.md
+      - name: Pattern-based `fixed` statement
+        href: ../../_csharplang/proposals/csharp-7.3/pattern-based-fixed.md
+      - name: Ref local reassignment
+        href: ../../_csharplang/proposals/csharp-7.3/ref-local-reassignment.md
+      - name: Stackalloc array initializers
+        href: ../../_csharplang/proposals/csharp-7.3/stackalloc-array-initializers.md
+      - name: Auto-implemented property field-targeted attributes
+        href: ../../_csharplang/proposals/csharp-7.3/auto-prop-field-attrs.md
+      - name: Expression variables in initializers
+        href: ../../_csharplang/proposals/csharp-7.3/expression-variables-in-initializers.md
+      - name: Tuple equality (==) and inequality (!=)
+        href: ../../_csharplang/proposals/csharp-7.3/tuple-equality.md
+      - name: Improved overload candidates
+        href: ../../_csharplang/proposals/csharp-7.3/improved-overload-candidates.md
+    - name: C# 8.0 features
+      items:
+      - name: Nullable reference types - proposal
+        href: ../../_csharplang/proposals/csharp-8.0/nullable-reference-types.md
+      - name: Nullable reference types - specification
+        href: ../../_csharplang/proposals/csharp-9.0/nullable-reference-types-specification.md
+      - name: Recursive pattern matching
+        href: ../../_csharplang/proposals/csharp-8.0/patterns.md
+      - name: Default interface methods
+        href: ../../_csharplang/proposals/csharp-8.0/default-interface-methods.md
+      - name: Async streams
+        href: ../../_csharplang/proposals/csharp-8.0/async-streams.md
+      - name: Ranges
+        href: ../../_csharplang/proposals/csharp-8.0/ranges.md
+      - name: Pattern based using and using declarations
+        href: ../../_csharplang/proposals/csharp-8.0/using.md
+      - name: Static local functions
+        href: ../../_csharplang/proposals/csharp-8.0/static-local-functions.md
+      - name: Null coalescing assignment
+        href: ../../_csharplang/proposals/csharp-8.0/null-coalescing-assignment.md
+      - name: Readonly instance members
+        href: ../../_csharplang/proposals/csharp-8.0/readonly-instance-members.md
+      - name: Nested stackalloc
+        href: ../../_csharplang/proposals/csharp-8.0/nested-stackalloc.md
+    - name: C# 9.0 features
+      items:
+      - name: Records
+        href: ../../_csharplang/proposals/csharp-9.0/records.md
+      - name: Top-level statements
+        href: ../../_csharplang/proposals/csharp-9.0/top-level-statements.md
+      - name: Nullable reference types - specification
+        href: ../../_csharplang/proposals/csharp-9.0/nullable-reference-types-specification.md
+      - name: Pattern matching enhancements
+        href: ../../_csharplang/proposals/csharp-9.0/patterns3.md
+      - name: Init only setters
+        href: ../../_csharplang/proposals/csharp-9.0/init.md
+      - name: Target-typed new expressions
+        href: ../../_csharplang/proposals/csharp-9.0/target-typed-new.md
+      - name: Module initializers
+        href: ../../_csharplang/proposals/csharp-9.0/module-initializers.md
+      - name: Extending partial methods
+        href: ../../_csharplang/proposals/csharp-9.0/extending-partial-methods.md
+      - name: Static anonymous functions
+        href: ../../_csharplang/proposals/csharp-9.0/static-anonymous-functions.md
+      - name: Target-typed conditional expression
+        href: ../../_csharplang/proposals/csharp-9.0/target-typed-conditional-expression.md
+      - name: Covariant return types
+        href: ../../_csharplang/proposals/csharp-9.0/covariant-returns.md
+      - name: Extension GetEnumerator in foreach loops
+        href: ../../_csharplang/proposals/csharp-9.0/extension-getenumerator.md
+      - name: Lambda discard parameters
+        href: ../../_csharplang/proposals/csharp-9.0/lambda-discard-parameters.md
+      - name: Attributes on local functions
+        href: ../../_csharplang/proposals/csharp-9.0/local-function-attributes.md
+      - name: Native sized integers
+        href: ../../_csharplang/proposals/csharp-9.0/native-integers.md
+      - name: Function pointers
+        href: ../../_csharplang/proposals/csharp-9.0/function-pointers.md
+      - name: Suppress emitting localsinit flag
+        href: ../../_csharplang/proposals/csharp-9.0/skip-localsinit.md
+      - name: Unconstrained type parameter annotations
+        href: ../../_csharplang/proposals/csharp-9.0/unconstrained-type-parameter-annotations.md