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Ajax.ActionLink() Not Redirecting To ActionResult With Ajax Attribute

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Given that I have this code in my .cshtml page using Ajax.ActionLink() that calls a controller method using Ajax request: 
@Ajax.ActionLink("Select", "TaskListing", new { id = item.TaskID }, 
   new AjaxOptions(){ 
    HttpMethod = "GET",
    UpdateTargetId = "taskListing",
    InsertionMode = InsertionMode.Replace
})
And the controller method called by the Ajax ActionLink is decorated with Ajax attribute. 
[HttpGet]
[AjaxOnly(true)]
[ActionName("TaskListing")]
public ActionResult TaskListing_Ajax(int id = -1)
{
 var projects = projRep.GetAllProjects();
 var model = new TaskAndTaskViewModel();
 model.Task = te.Tasks.FirstOrDefault(t => t.TaskID == id);
 model.SelectList = from p in projRep.GetAllProjects()
        select new SelectListItem
        {
         Selected = (p.ProjectID == Convert.ToInt32(model.Task.ProjectID)),
         Text = p.ProjectName.ToString(),
         Value = p.ProjectID.ToString()
        };

 return PartialView("TaskForm", model);
}
Normally, the request would push through. If does not proceed, maybe you have not added the Microsoft JQuery Unobtrusive Ajax to your project. Downloading and installing the said package(Microsoft JQuery Unobtrusive Ajax) via NuGet might fix the problem.

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