diff --git a/Gu.Roslyn.AnalyzerExtensions/Scope.cs b/Gu.Roslyn.AnalyzerExtensions/Scope.cs
index ac00fd3..7ac455f 100644
--- a/Gu.Roslyn.AnalyzerExtensions/Scope.cs
+++ b/Gu.Roslyn.AnalyzerExtensions/Scope.cs
@@ -36,15 +36,11 @@ public static bool HasParameter(SyntaxNode nodeInScope, string name)
                     case BaseMethodDeclarationSyntax method:
                         return HasParameter(method.ParameterList);
                     case AccessorDeclarationSyntax accessor:
-                        switch (accessor.Kind())
+                        return accessor.Kind() switch
                         {
-                            case SyntaxKind.AddAccessorDeclaration:
-                            case SyntaxKind.RemoveAccessorDeclaration:
-                            case SyntaxKind.SetAccessorDeclaration:
-                                return name == "value";
-                        }
-
-                        return false;
+                            SyntaxKind.AddAccessorDeclaration or SyntaxKind.RemoveAccessorDeclaration or SyntaxKind.SetAccessorDeclaration => name == "value",
+                            _ => false,
+                        };
                     case ParenthesizedLambdaExpressionSyntax { ParameterList: { } lambdaParameters }
                         when HasParameter(lambdaParameters):
                     case SimpleLambdaExpressionSyntax { Parameter.Identifier.ValueText: { } valueText }
diff --git a/Gu.Roslyn.AnalyzerExtensions/Walkers/Execution/ExecutionWalker.cs b/Gu.Roslyn.AnalyzerExtensions/Walkers/Execution/ExecutionWalker.cs
index a451984..86186ec 100644
--- a/Gu.Roslyn.AnalyzerExtensions/Walkers/Execution/ExecutionWalker.cs
+++ b/Gu.Roslyn.AnalyzerExtensions/Walkers/Execution/ExecutionWalker.cs
@@ -463,7 +463,7 @@ protected override void Clear()
             this.Recursion = null!;
         }
 
-        private class TypeDeclarationWalker : PooledWalker<TypeDeclarationWalker>
+        private sealed class TypeDeclarationWalker : PooledWalker<TypeDeclarationWalker>
         {
 #pragma warning disable SA1401 // Fields must be private
             internal readonly List<EqualsValueClauseSyntax> Initializers = new();