/// <summary>
        /// This method is called when the Content Type declared in the attribute hasn't been found in Umbraco
        /// </summary>
        /// <param name="contentTypeService"></param>
        /// <param name="fileService"></param>
        /// <param name="attribute"></param>
        /// <param name="type"></param>
        /// <param name="dataTypeService"></param>
        private static void CreateContentType(IContentTypeService contentTypeService, IFileService fileService,
            UmbracoContentTypeAttribute attribute, Type type, IDataTypeService dataTypeService)
        {
            IContentType newContentType;
            Type parentType = type.BaseType;
            if (parentType != null && parentType != typeof(UmbracoGeneratedBase) && parentType.GetBaseTypes(false).Any(x => x == typeof(UmbracoGeneratedBase)))
            {
                UmbracoContentTypeAttribute parentAttribute = parentType.GetCustomAttribute<UmbracoContentTypeAttribute>();
                if (parentAttribute != null)
                {
                    string parentAlias = parentAttribute.ContentTypeAlias;
                    IContentType parentContentType = contentTypeService.GetContentType(parentAlias);
                    newContentType = new ContentType(parentContentType);
                }
                else
                {
                    throw new Exception("The given base class has no UmbracoContentTypeAttribute");
                }
            }
            else
            {
                newContentType = new ContentType(-1);
            }

            newContentType.Name = attribute.ContentTypeName;
            newContentType.Alias = attribute.ContentTypeAlias;
            newContentType.Icon = attribute.Icon;
            newContentType.Description = attribute.Description;

            if (attribute.CreateMatchingView)
            {
                SetDefaultTemplateAndCreateIfNotExists(fileService, attribute.MasterTemplate, attribute.TemplateLocation, type, newContentType);
            }

            CreateAdditionalTemplates(newContentType, type, fileService, attribute.MasterTemplate, attribute.TemplateLocation);

            newContentType.AllowedAsRoot = attribute.AllowedAtRoot;
            newContentType.IsContainer = attribute.EnableListView;
            newContentType.AllowedContentTypes = FetchAllowedContentTypes(attribute.AllowedChildren, contentTypeService);

            //create tabs 
            CreateTabs(newContentType, type, dataTypeService);

            //create properties on the generic tab
            var propertiesOfRoot = type.GetProperties().Where(x => x.GetCustomAttribute<UmbracoPropertyAttribute>() != null);
            foreach (var item in propertiesOfRoot)
            {
                CreateProperty(newContentType, null, dataTypeService, true, item);
            }

            //Save and persist the content Type
            contentTypeService.Save(newContentType, 0);
        }
        /// <summary>
        /// Update the existing content Type based on the data in the attributes
        /// </summary>
        /// <param name="contentTypeService"></param>
        /// <param name="fileService"></param>
        /// <param name="attribute"></param>
        /// <param name="contentType"></param>
        /// <param name="type"></param>
        /// <param name="dataTypeService"></param>
        private static void UpdateContentType(IContentTypeService contentTypeService, IFileService fileService, UmbracoContentTypeAttribute attribute, IContentType contentType, Type type, IDataTypeService dataTypeService)
        {
            contentType.Name = attribute.ContentTypeName;
            contentType.Alias = attribute.ContentTypeAlias;
            contentType.Icon = attribute.Icon;
            contentType.IsContainer = attribute.EnableListView;
            contentType.AllowedContentTypes = FetchAllowedContentTypes(attribute.AllowedChildren, contentTypeService);
            contentType.AllowedAsRoot = attribute.AllowedAtRoot;

            Type parentType = type.BaseType;
            if (parentType != null && parentType != typeof(UmbracoGeneratedBase) && parentType.GetBaseTypes(false).Any(x => x == typeof(UmbracoGeneratedBase)))
            {
                UmbracoContentTypeAttribute parentAttribute = parentType.GetCustomAttribute<UmbracoContentTypeAttribute>();
                if (parentAttribute != null)
                {
                    string parentAlias = parentAttribute.ContentTypeAlias;
                    IContentType parentContentType = contentTypeService.GetContentType(parentAlias);
                    contentType.ParentId = parentContentType.Id;
                }
                else
                {
                    throw new Exception("The given base class has no UmbracoContentTypeAttribute");
                }
            }

            if (attribute.CreateMatchingView)
            {
                Template currentTemplate = fileService.GetTemplate(attribute.ContentTypeAlias) as Template;
                if (currentTemplate == null)
                {
                    //there should be a template but there isn't so we create one
                    currentTemplate = new Template("~/Views/" + attribute.ContentTypeAlias + ".cshtml", attribute.ContentTypeName, attribute.ContentTypeAlias);
                    CreateViewFile(attribute.ContentTypeAlias, attribute.MasterTemplate, currentTemplate, type, fileService);
                    fileService.SaveTemplate(currentTemplate, 0);
                }
                contentType.AllowedTemplates = new ITemplate[] { currentTemplate };
                contentType.SetDefaultTemplate(currentTemplate);
            }

            VerifyProperties(contentType, type, dataTypeService);

            //verify if a tab has no properties, if so remove
            var propertyGroups = contentType.PropertyGroups.ToArray();
            int length = propertyGroups.Length;
            for (int i = 0; i < length; i++)
            {
                if (propertyGroups[i].PropertyTypes.Count == 0)
                {
                    //remove
                    contentType.RemovePropertyGroup(propertyGroups[i].Name);
                }
            }

            //persist
            contentTypeService.Save(contentType, 0);
        }
        /// <summary>
        /// Creates a View if specified in the attribute
        /// </summary>
        /// <param name="fileService"></param>
        /// <param name="attribute"></param>
        /// <param name="type"></param>
        /// <param name="newContentType"></param>
        private static void CreateMatchingView(IFileService fileService, UmbracoContentTypeAttribute attribute, Type type, IContentType newContentType)
        {
            Template currentTemplate = fileService.GetTemplate(attribute.ContentTypeAlias) as Template;
            if (currentTemplate == null)
            {
                currentTemplate = new Template("~/Views/" + attribute.ContentTypeAlias + ".cshtml", attribute.ContentTypeName, attribute.ContentTypeAlias);
                CreateViewFile(attribute.ContentTypeAlias, attribute.MasterTemplate, currentTemplate, type, fileService);
            }

            newContentType.AllowedTemplates = new ITemplate[] { currentTemplate };
            newContentType.SetDefaultTemplate(currentTemplate);

            //TODO: in Umbraco 7.1 it will be possible to set the master template of the newly created template
            //https://github.com/umbraco/Umbraco-CMS/pull/294
        }
        /// <summary>
        /// Creates a View if specified in the attribute
        /// </summary>
        /// <param name="fileService"></param>
        /// <param name="attribute"></param>
        /// <param name="type"></param>
        /// <param name="newContentType"></param>
        private static void CreateMatchingView(IFileService fileService, UmbracoContentTypeAttribute attribute, Type type, IContentType newContentType)
        {
            var currentTemplate = fileService.GetTemplate(attribute.ContentTypeAlias) as Template;
            if (currentTemplate == null)
            {
                string templatePath;
                if (string.IsNullOrEmpty(attribute.TemplateLocation))
                {
                    templatePath = string.Format(CultureInfo.InvariantCulture, "~/Views/{0}.cshtml", attribute.ContentTypeAlias);
                }
                else
                {
                    templatePath = string.Format(CultureInfo.InvariantCulture, "{0}{1}{2}.cshtml",
                        attribute.TemplateLocation,                                     // The template location
                        attribute.TemplateLocation.EndsWith("/") ? string.Empty : "/",  // Ensure the template location ends with a "/"
                        attribute.ContentTypeAlias);                                    // The alias
                }

                currentTemplate = new Template(templatePath, attribute.ContentTypeName, attribute.ContentTypeAlias);
                CreateViewFile(attribute.MasterTemplate, currentTemplate, type, fileService);
            }

            newContentType.AllowedTemplates = new ITemplate[] { currentTemplate };
            newContentType.SetDefaultTemplate(currentTemplate);

            //TODO: in Umbraco 7.1 it will be possible to set the master template of the newly created template
            //https://github.com/umbraco/Umbraco-CMS/pull/294
        }