ASP.NET Core and JQuery unobtrusive AJAX not working

Question

If I start a new project in .net 4.5 and hit manage nuget packages, search for ajax, then hit install for ajax unobtrusive. I can then go into my cshtml file and type @Ajax.___

Answer 1

What is the equlivalent of OnSuccess

@using (Ajax.BeginForm("EmployeeMaster", "Home", new AjaxOptions { HttpMethod = "POST", UpdateTargetId = "divEmp", OnSuccess="ShowMessage" }))
{
    //form content
}