How prevent code to hit twice controller?

[HttpGet]
       public ActionResult deleteUserDialog(int id)
       {
           var Company = db.tbl_Compnay.Where(x => x.ID == id).Select(a=> new Company{ ID = a.ID }).FirstOrDefault();
           ViewBag.UserId = id;
           return View(Company);
       }
       [HttpPost]
       public ActionResult deleteUserDialog(Company dataObject)
       {

           var Company = db.tbl_Compnay.Where(x => x.ID == dataObject.ID).FirstOrDefault();
           db.tbl_Compnay.Remove(Company);
           db.SaveChanges();

           return Json(new
           {
               Message = "Deleted Successfully."
           }, JsonRequestBehavior.AllowGet);

       }

@{
    Layout = null;
}

<meta name="viewport" content="width=device-width, initial-scale=1">

<link href="~/Content/bootstrap.min.css" rel="stylesheet" />
<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script src="~/Scripts/jquery.validate.min.js"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>
<script src="~/Scripts/bootstrap.min.js"></script>

<div class="modal-header">
    <button type="button" style="margin-right: 10px" class="close" data-dismiss="modal">×</button>
    <br />
    <h4 class="modal-title">Delete Employee</h4>
</div>


<div class="modal-body">

    @using (Html.BeginForm("Delete", "CURD", FormMethod.Post))
    {
        <p>Are you sure you want to delete this?</p>
                <div class="modal-footer">
                    <input type="submit" class="btn btn-danger" value="Delete" />

                    <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>

                </div>
    }
</div>