public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
        {
            SyntaxNode root = await context.Document.GetSyntaxRootAsync(context.CancellationToken);

            ForEachStatementSyntax forEachStatement = root
                                                      .FindNode(context.Span, getInnermostNodeForTie: true)?
                                                      .FirstAncestorOrSelf <ForEachStatementSyntax>();

            if (forEachStatement == null)
            {
                return;
            }

            SemanticModel semanticModel = await context.Document.GetSemanticModelAsync(context.CancellationToken);

            if (semanticModel == null)
            {
                return;
            }

            ChangeType(context, semanticModel, forEachStatement);

            RenameIdentifierNameAccordingToTypeName(context, semanticModel, forEachStatement);

            ChangeTypeAccordingToExpression(context, semanticModel, forEachStatement);

            if (ForEachToForRefactoring.CanRefactor(forEachStatement, semanticModel, context.CancellationToken))
            {
                context.RegisterRefactoring(
                    "Convert foreach to for",
                    cancellationToken => ForEachToForRefactoring.RefactorAsync(context.Document, forEachStatement, cancellationToken));
            }
        }
        private void AnalyzeForEachStatement(SyntaxNodeAnalysisContext context)
        {
            if (GeneratedCodeAnalyzer?.IsGeneratedCode(context) == true)
            {
                return;
            }

            var forEachStatement = (ForEachStatementSyntax)context.Node;

            if (!ForEachToForRefactoring.CanRefactor(forEachStatement, context.SemanticModel, context.CancellationToken))
            {
                return;
            }

            context.ReportDiagnostic(
                DiagnosticDescriptors.ConvertForEachToFor,
                forEachStatement.Type.GetLocation());

            TextSpan span = TextSpan.FromBounds(forEachStatement.ForEachKeyword.SpanStart + 3, forEachStatement.ForEachKeyword.Span.End);

            Location location = Location.Create(forEachStatement.SyntaxTree, span);

            context.ReportDiagnostic(DiagnosticDescriptors.ConvertForEachToForFadeOut, location);
        }