[DiagnosticAnalyzer(LanguageNames.CSharp, LanguageNames.VisualBasic)]
        public sealed class RegisterOperationBlockAndOperationActionAnalyzer : DiagnosticAnalyzer
        {
            private static readonly DiagnosticDescriptor s_descriptor = new DiagnosticDescriptor(
                "ID0001",
                "Title",
                "Message",
                "Category",
                defaultSeverity: DiagnosticSeverity.Warning,
                isEnabledByDefault: true);

            public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => ImmutableArray.Create(s_descriptor);
            public override void Initialize(AnalysisContext analysisContext)
            {
                analysisContext.RegisterOperationAction(_ => { }, OperationKind.Invocation);
                analysisContext.RegisterOperationBlockStartAction(OnOperationBlockStart);
            }

            private void OnOperationBlockStart(OperationBlockStartAnalysisContext context)
            {
                context.RegisterOperationBlockEndAction(
                    endContext => endContext.ReportDiagnostic(Diagnostic.Create(s_descriptor, context.OwningSymbol.Locations[0])));
            }
        }