/// <summary>
        /// Add default documents
        /// </summary>
        /// <param name="documentNames">Collection of default document names</param>
        /// <returns>AppServiceWebAppConfiguration</returns>
        public AppServiceWebAppConfiguration UseDefaultDocument(params string[] documentNames)
        {
            if (DefaultDocuments == null)
            {
                DefaultDocuments = new List <string>();
            }

            foreach (string doc in documentNames)
            {
                if (!DefaultDocuments.Contains(doc))
                {
                    DefaultDocuments.Add(doc);
                }
            }

            return(this);
        }