[LogThis]
[DonutOutputCache(Duration=5, Order=100)]
public ActionResult Index()

@Ajax.ActionLink("Test",
                 "action",
                 new AjaxOptions { HttpMethod = "POST", 
                                   InsertionMode = InsertionMode.Replace, 
                                   UpdateTargetId = "UserDiv", 
                                   OnSuccess="$.validator.unobtrusive.parse('#my_form_id');"  
                                 }
                )

<script type="text/javascript">
    $.validator.unobtrusive.parse("#my_frm_id");
</script>

Details/{projectId}/{issueId}