title: ASP.Net MVC 5 CKEditor AllowHtml RequiredAttribute Not working
body: <p>I am using AllowHtml for CKeditor  in my model and i have also assign Required field, but validation not working, my model is Like :-  </p>
  
  <pre><code>    [Display(Name = "Introduction Details:")]
      [Required(ErrorMessage = "Introduction Details is required.")]
      [AllowHtml]
      public string Introduction { get; set; }   
  </code></pre>