Merge pull request #19495 from lachbaer/GetContextualKeywordsKinds_fix

Changed GetContextualKeywordKinds(), always return all contextual keywords

src/Compilers/CSharp/Portable/Syntax/SyntaxKind.cs

@@ -194,7 +194,11 @@ public enum SyntaxKind : ushort
         AsyncKeyword = 8435,
         AwaitKeyword = 8436,
         WhenKeyword = 8437,
+        /// when adding a contextual keyword following functions must be adapted:
+        /// <see cref="SyntaxFacts.GetContextualKeywordKinds"/>
+        /// <see cref="SyntaxFacts.IsContextualKeyword(SyntaxKind)"/>
 
+        // keywords with an enum value less than ElifKeyword are considered i.a. contextual keywords
         // additional preprocessor keywords
         ElifKeyword = 8467,
         EndIfKeyword = 8468,