public IActionResult OnPostCreateArticle()
        {
            m_knowledgeService.CreateArticle(Input.Title, Input.Content, Input.Id);
            var link = Url.Knowledgebase(Request.Scheme);

            var Customers = m_userManager.GetUsersInRoleAsync("Customer").Result.ToList();

            foreach (var Customer in Customers)
            {
                m_mailManager.SendEmailNewArticle(Customer.Email, link);
            }



            return(RedirectToPage("../Knowledge/ManageArticles"));
        }