Move more into SyntaxKinds

src/Workspaces/CSharp/Portable/LanguageServices/CSharpSyntaxFactsService.cs

@@ -180,9 +180,6 @@ public SyntaxNode GetDefaultOfParameter(SyntaxNode node)
         public SyntaxNode GetParameterList(SyntaxNode node)
             => CSharpSyntaxGenerator.GetParameterList(node);
 
-        public bool IsSkippedTokensTrivia(SyntaxNode node)
-            => node is SkippedTokensTriviaSyntax;
-
         public SyntaxToken GetIdentifierOfGenericName(SyntaxNode genericName)
         {
             return genericName is GenericNameSyntax csharpGenericName

src/Workspaces/CSharp/Portable/LanguageServices/CSharpSyntaxKindsService.cs

@@ -23,6 +23,7 @@ public override TSyntaxKind Convert<TSyntaxKind>(int kind)
         public override int ConflictMarkerTrivia => (int)SyntaxKind.ConflictMarkerTrivia;
         public override int DisabledTextTrivia => (int)SyntaxKind.DisabledTextTrivia;
         public override int EndOfLineTrivia => (int)SyntaxKind.EndOfLineTrivia;
+        public override int SkippedTokensTrivia => (int)SyntaxKind.SkippedTokensTrivia;
 
         public override int DotToken => (int)SyntaxKind.DotToken;
         public override int QuestionToken => (int)SyntaxKind.QuestionToken;

src/Workspaces/Core/Portable/LanguageServices/SyntaxFactsService/AbstractSyntaxFactsService.cs

@@ -606,6 +606,9 @@ public bool HasIncompleteParentMember(SyntaxNode node)
 
 #nullable enable
 
+        public bool IsSkippedTokensTrivia([NotNullWhen(true)] SyntaxNode? node)
+            => node?.RawKind == SyntaxKinds.SkippedTokensTrivia;
+
         public bool IsGenericName([NotNullWhen(true)] SyntaxNode? node)
             => node?.RawKind == SyntaxKinds.GenericName;
 

src/Workspaces/Core/Portable/LanguageServices/SyntaxFactsService/ISyntaxKindsService.cs

@@ -4,6 +4,7 @@
 
 #nullable enable
 
+using System.Runtime.CompilerServices;
 using Microsoft.CodeAnalysis.Host;
 
 namespace Microsoft.CodeAnalysis.LanguageServices
@@ -19,6 +20,7 @@ internal interface ISyntaxKindsService : ILanguageService
         int ConflictMarkerTrivia { get; }
         int DisabledTextTrivia { get; }
         int EndOfLineTrivia { get; }
+        int SkippedTokensTrivia { get; }
 
         int DotToken { get; }
         int QuestionToken { get; }
@@ -67,6 +69,7 @@ internal abstract class AbstractSyntaxKindsService : ISyntaxKindsService
         public abstract int ConflictMarkerTrivia { get; }
         public abstract int DisabledTextTrivia { get; }
         public abstract int EndOfLineTrivia { get; }
+        public abstract int SkippedTokensTrivia { get; }
 
         public abstract int DotToken { get; }
         public abstract int QuestionToken { get; }

src/Workspaces/VisualBasic/Portable/LanguageServices/VisualBasicSyntaxFactsService.vb

@@ -226,8 +226,8 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
             Return VisualBasicSyntaxGenerator.GetParameterList(node)
         End Function
 
-        Public Function IsSkippedTokensTrivia(node As SyntaxNode) As Boolean Implements ISyntaxFactsService.IsSkippedTokensTrivia
-            Return TypeOf node Is SkippedTokensTriviaSyntax
+        Private Function ISyntaxFacts_IsSkippedTokensTrivia(node As SyntaxNode) As Boolean Implements ISyntaxFactsService.IsSkippedTokensTrivia
+            Return IsSkippedTokensTrivia(node)
         End Function
 
         Public Function ISyntaxFactsService_HasIncompleteParentMember(node As SyntaxNode) As Boolean Implements ISyntaxFactsService.HasIncompleteParentMember

src/Workspaces/VisualBasic/Portable/LanguageServices/VisualBasicSyntaxKindsService.vb

@@ -21,6 +21,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.LanguageServices
         Public Overrides ReadOnly Property ConflictMarkerTrivia As Integer = SyntaxKind.ConflictMarkerTrivia
         Public Overrides ReadOnly Property DisabledTextTrivia As Integer = SyntaxKind.DisabledTextTrivia
         Public Overrides ReadOnly Property EndOfLineTrivia As Integer = SyntaxKind.EndOfLineTrivia
+        Public Overrides ReadOnly Property SkippedTokensTrivia As Integer = SyntaxKind.SkippedTokensTrivia
 
         Public Overrides ReadOnly Property DotToken As Integer = SyntaxKind.DotToken
         Public Overrides ReadOnly Property QuestionToken As Integer = SyntaxKind.QuestionToken