public override object VisitClass_declaration([NotNull] CSharpParser.Class_declarationContext context)
        {
            bool matchNames        = context.identifier().GetText() == ServiceClassName;
            bool isTypeParamsMatch = true;
            var  typeParams        = context?.type_parameter_list()?.type_parameter();

            if (!(typeParams is null && (TypeParameters is null || TypeParameters.Count == 0)))
            {
                if ((typeParams?.Length ?? 0) != (TypeParameters?.Count ?? 0))
                {
                    isTypeParamsMatch = false;
                }
                else
                {
                    for (int i = 0; i < typeParams.Length; ++i)
                    {
                        if (typeParams[i].identifier().GetText() != TypeParameters[i].TypeParam)
                        {
                            isTypeParamsMatch = false;
                            break;
                        }
                    }
                }
            }

            if (matchNames && isTypeParamsMatch)
            {
                HasServiceClass          = true;
                Results.ServiceNamespace = string.Join(".", _currentNamespace.ToArray().Reverse());
                var classDeclaration = new ClassInterfaceDeclaration()
                {
                    IsInterface = false,
                    Attributes  = _cSharpParserService.GetTextWithWhitespace(Tokens, context?.attributes()),
                    Identifier  = ServiceClassName
                };

                //Results.ClassInterfaceDeclarations.Add(className, classDeclaration);
                Results.ServiceDeclaration = classDeclaration;

                if (context?.PARTIAL()?.GetText() != null)
                {
                    classDeclaration.Modifiers.Add(context.PARTIAL().GetText());
                }

                if (context?.class_modifier() != null)
                {
                    foreach (var modifier in context.class_modifier())
                    {
                        classDeclaration.Modifiers.Add(modifier.GetText());
                    }
                }

                var typeParameters     = context?.type_parameter_list()?.type_parameter();
                var constraintsClauses =
                    context?.type_parameter_constraints_clauses()?.type_parameter_constraints_clause();

                classDeclaration.TypeParameters =
                    _cSharpParserService.ParseTypeParameterList(Tokens, typeParameters, constraintsClauses);

                var baseClassType = _cSharpParserService.GetTextWithWhitespaceMinifiedLite(
                    Tokens, context?.class_base()?.class_type());
                var interfaceTypes = context?.class_base()?.interface_type_list()?.interface_type();
                if (interfaceTypes != null || baseClassType != null)
                {
                    classDeclaration.Base = new ClassInterfaceBase();
                    if (baseClassType != null)
                    {
                        classDeclaration.Base.ClassType = baseClassType;
                    }

                    if (interfaceTypes != null)
                    {
                        foreach (var interfaceType in interfaceTypes)
                        {
                            classDeclaration.Base.InterfaceTypeList.Add(
                                _cSharpParserService.GetTextWithWhitespaceMinifiedLite(Tokens, interfaceType));
                        }
                    }
                }

                var memberDeclarations = context?.class_body()?.class_member_declarations()?.class_member_declaration();
                if (memberDeclarations != null)
                {
                    foreach (var memberDeclaration in memberDeclarations)
                    {
                        bool isPublic = false;

                        var classMethodDeclaration   = memberDeclaration?.method_declaration();
                        var classPropertyDeclaration = memberDeclaration?.property_declaration();
                        if (classMethodDeclaration != null)
                        {
                            var methodDeclaration = new MethodDeclaration()
                            {
                                Attributes = _cSharpParserService.GetTextWithWhitespace(
                                    Tokens, classMethodDeclaration?.method_header()?.attributes()),
                                ReturnType = _cSharpParserService.GetTextWithWhitespaceMinifiedLite(
                                    Tokens, classMethodDeclaration.method_header().return_type()),
                                Identifier = classMethodDeclaration.method_header().member_name().GetText(),
                                Body       = _cSharpParserService.GetTextWithWhitespaceUntab(
                                    Tokens, classMethodDeclaration.method_body())
                            };

                            var methodModifiers = classMethodDeclaration?.method_header()?.method_modifier();
                            if (methodModifiers != null)
                            {
                                foreach (var methodMod in methodModifiers)
                                {
                                    if (methodMod.GetText() == Keywords.Public)
                                    {
                                        isPublic = true;
                                    }
                                    methodDeclaration.Modifiers.Add(methodMod.GetText());
                                }
                            }

                            if (!isPublic)
                            {
                                continue;
                            }

                            var formalParameterList = classMethodDeclaration?.method_header()?.formal_parameter_list();
                            methodDeclaration.FormalParameterList =
                                _cSharpParserService.ParseFormalParameterList(Tokens, formalParameterList);

                            var methodTypeParameters =
                                classMethodDeclaration?.method_header()?.type_parameter_list()?.type_parameter();
                            var methodConstraintsClauses = classMethodDeclaration
                                                           ?.method_header()
                                                           ?.type_parameter_constraints_clauses()
                                                           ?.type_parameter_constraints_clause();

                            methodDeclaration.TypeParameters = _cSharpParserService
                                                               .ParseTypeParameterList(Tokens, methodTypeParameters, methodConstraintsClauses);

                            classDeclaration.Body.MethodDeclarations.Add(methodDeclaration);
                        }
                        else if (classPropertyDeclaration != null)
                        {
                            var propertyDeclaration = new PropertyDeclaration()
                            {
                                Attributes = _cSharpParserService.GetTextWithWhitespace(
                                    Tokens, classPropertyDeclaration?.attributes()),
                                Type = _cSharpParserService.GetTextWithWhitespaceMinifiedLite(
                                    Tokens, classPropertyDeclaration.type_()),
                                Identifier = classPropertyDeclaration.member_name().GetText(),
                                Body       = new PropertyBody()
                                {
                                    Text = _cSharpParserService.GetTextWithWhitespaceUntab(
                                        Tokens, classPropertyDeclaration.property_body()),
                                    HasGetAccessor = classPropertyDeclaration.property_body().expression() != null
                                                     | classPropertyDeclaration.property_body()
                                                     ?.accessor_declarations()
                                                     ?.get_accessor_declaration() != null,
                                    HasSetAccessor = classPropertyDeclaration.property_body()
                                                     ?.accessor_declarations()
                                                     ?.set_accessor_declaration() != null
                                }
                            };

                            var propertyModifiers = classPropertyDeclaration?.property_modifier();
                            if (propertyModifiers != null)
                            {
                                foreach (var propModifier in propertyModifiers)
                                {
                                    if (propModifier.GetText() == Keywords.Public)
                                    {
                                        isPublic = true;
                                    }
                                    propertyDeclaration.Modifiers.Add(propModifier.GetText());
                                }
                            }

                            if (!isPublic)
                            {
                                continue;
                            }

                            classDeclaration.Body.PropertyDeclarations.Add(propertyDeclaration);
                        }
                    }
                }
            }
            VisitChildren(context);
            return(null);
        }
        public override object VisitClass_declaration([NotNull] CSharpParser.Class_declarationContext context)
        {
            _currentClass.Push(context.identifier().GetText());

            var typeParameters   = _serviceFile.ServiceDeclaration.TypeParameters;
            var currentNamespace = GetCurrentNamespace();

            bool isTypeParamsMatch = true;
            var  typeParams        = context?.type_parameter_list()?.type_parameter();

            if (!(typeParams is null && (typeParameters is null || typeParameters.Count == 0)))
            {
                if ((typeParams?.Length ?? 0) != (typeParameters?.Count ?? 0))
                {
                    isTypeParamsMatch = false;
                }
                else
                {
                    for (int i = 0; i < typeParams.Length; ++i)
                    {
                        if (typeParams[i].identifier().GetText() != typeParameters[i].TypeParam)
                        {
                            isTypeParamsMatch = false;
                            break;
                        }
                    }
                }
            }

            if (GetCurrentClass() == _serviceClassInterfaceName &&
                currentNamespace == _serviceFile.ServiceNamespace &&
                isTypeParamsMatch)
            {
                _isCorrectClass.Push(true);
                _hasServiceClass = true;
            }
            else
            {
                _isCorrectClass.Push(false);
            }

            VisitChildren(context);

            if (_isCorrectClass.Peek())
            {
                _hasServiceClass = true;
                var preclassWhitespace = Tokens.GetHiddenTokensToLeft(context.Start.TokenIndex, Lexer.Hidden);

                int tabLevels = 1 + ((preclassWhitespace?.Count ?? 0) > 0 ?
                                     _stringUtilService.CalculateTabLevels(preclassWhitespace[0]?.Text ?? string.Empty, _tabString) : 0);

                int?finalProperty                = null;
                int?finalMethod                  = null;
                int?finalField                   = null;
                int?finalConstantOrField         = null;
                int?finalConstructorOrDestructor = null;

                var members = context?.class_body()?.class_member_declarations()?.class_member_declaration();
                if (members != null)
                {
                    foreach (var member in members)
                    {
                        if (member.method_declaration() != null)
                        {
                            finalMethod = member.method_declaration().Stop.TokenIndex;
                        }
                        else if (member.property_declaration() != null)
                        {
                            finalProperty = member.property_declaration().Stop.TokenIndex;
                        }
                        else if (member.constant_declaration() != null)
                        {
                            finalConstantOrField = member.constant_declaration().Stop.TokenIndex;
                        }
                        else if (member.field_declaration() != null)
                        {
                            finalConstantOrField = member.field_declaration().Stop.TokenIndex;
                            finalField           = member.field_declaration().Stop.TokenIndex;
                        }
                        else if (member.constructor_declaration() != null)
                        {
                            finalConstructorOrDestructor = member.constructor_declaration().Stop.TokenIndex;
                        }
                        else if (member.static_constructor_declaration() != null)
                        {
                            finalConstructorOrDestructor = member.static_constructor_declaration().Stop.TokenIndex;
                        }
                        else if (member.destructor_declaration() != null)
                        {
                            finalConstructorOrDestructor = member.destructor_declaration().Stop.TokenIndex;
                        }
                    }
                }

                int fieldStopIndex = finalField
                                     ?? finalConstantOrField
                                     ?? context.class_body().OPEN_BRACE().Symbol.TokenIndex;

                int?constructorStopIndex = null;
                int?propertyStopIndex    = null;
                int?methodStopIndex      = null;

                var           fieldStringBuilder       = new StringBuilder();
                StringBuilder constructorStringBuilder = null;
                StringBuilder propertyStringBuilder    = null;
                StringBuilder methodStringBuilder      = null;

                if (_fieldDict.Keys.Count > 0)
                {
                    // add fields
                    foreach (var field in _fieldDict.Values)
                    {
                        fieldStringBuilder.Append(_cSharpParserService.GenerateFieldDeclaration(
                                                      field,
                                                      tabLevels,
                                                      _tabString));
                    }
                }

                if (!_hasServiceConstructor)
                {
                    // add ctor
                    constructorStopIndex = finalProperty
                                           ?? finalConstantOrField
                                           ?? fieldStopIndex;

                    constructorStringBuilder = constructorStopIndex == fieldStopIndex
                        ? fieldStringBuilder : new StringBuilder();

                    constructorStringBuilder.Append(_cSharpParserService.GenerateConstructorDeclaration(
                                                        _serviceFile.ServiceDeclaration.Body.ConstructorDeclaration,
                                                        tabLevels,
                                                        _tabString));
                }

                if (_serviceFile.ServiceDeclaration.Body?.PropertyDeclarations != null &&
                    _serviceFile.ServiceDeclaration.Body.PropertyDeclarations.Count > 0)
                {
                    // add properties
                    propertyStopIndex = finalProperty
                                        ?? finalConstructorOrDestructor
                                        ?? constructorStopIndex
                                        ?? fieldStopIndex;

                    propertyStringBuilder = propertyStopIndex == fieldStopIndex
                        ? fieldStringBuilder : (propertyStopIndex == constructorStopIndex
                            ? constructorStringBuilder : new StringBuilder());

                    propertyStringBuilder.Append(
                        _cSharpParserService.GeneratePropertyDeclarations(
                            _serviceFile.ServiceDeclaration.Body.PropertyDeclarations,
                            tabLevels,
                            _tabString));
                }

                if (_serviceFile.ServiceDeclaration.Body?.MethodDeclarations != null &&
                    _serviceFile.ServiceDeclaration.Body.MethodDeclarations.Count > 0)
                {
                    // add methods
                    methodStopIndex = finalMethod
                                      ?? finalProperty
                                      ?? finalConstructorOrDestructor
                                      ?? constructorStopIndex
                                      ?? fieldStopIndex;

                    methodStringBuilder = methodStopIndex == fieldStopIndex
                        ? fieldStringBuilder : (methodStopIndex == constructorStopIndex
                            ? constructorStringBuilder : (methodStopIndex == propertyStopIndex
                                ? propertyStringBuilder : new StringBuilder()));

                    methodStringBuilder.Append(
                        _cSharpParserService.GenerateMethodDeclarations(
                            _serviceFile.ServiceDeclaration.Body.MethodDeclarations,
                            tabLevels,
                            _tabString));
                }

                var fieldString = fieldStringBuilder.ToString();
                if (fieldString.Length > 0)
                {
                    IsModified = true;
                    Rewriter.InsertAfter(fieldStopIndex, fieldString);
                }

                if (constructorStringBuilder != null &&
                    constructorStopIndex != fieldStopIndex)
                {
                    var constructorString = constructorStringBuilder.ToString();
                    if (constructorString.Length > 0)
                    {
                        IsModified = true;
                        Rewriter.InsertAfter(constructorStopIndex ?? -1, constructorString);
                    }
                }

                if (propertyStringBuilder != null &&
                    propertyStopIndex != constructorStopIndex &&
                    propertyStopIndex != fieldStopIndex)
                {
                    var propertyString = propertyStringBuilder.ToString();
                    if (propertyString.Length > 0)
                    {
                        IsModified = true;
                        Rewriter.InsertAfter(propertyStopIndex ?? -1, propertyString);
                    }
                }

                if (methodStringBuilder != null &&
                    methodStopIndex != constructorStopIndex &&
                    methodStopIndex != fieldStopIndex &&
                    methodStopIndex != propertyStopIndex)
                {
                    var methodString = methodStringBuilder.ToString();
                    if (methodString.Length > 0)
                    {
                        IsModified = true;
                        Rewriter.InsertAfter(methodStopIndex ?? -1, methodString);
                    }
                }
            }
            _ = _isCorrectClass.Pop();
            _ = _currentClass.Pop();
            return(null);
        }