public ActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Index(LoginInfo login)
        {
            if (Request.Form["Submit"] != null)
            {
                string Username = login.Username;
                string Password = login.Password;

                ViewBag.Massage = "";

                if (Username == "Admin" && Password == "123")
                {
                    ViewBag.Massage = "Login Successfull";

                    return RedirectToAction("MSISDN","UnSub");
                }
                else
                {
                    ViewBag.Massage = "Please Enter Valid Login Information";
                }
            }
            return View();
        }

<form name="myForm" action="/Home/Index"  method="post">
    <div align="center">
        <div style="color:red">@ViewBag.Massage</div>
        <br>
        <label for="Username">Username:</label>
        <input type="text" name="Username" id="Username">
        <label for="Password">Password:</label>
         <input type="password" name="Password" id="Password">
        <br>
        <input type="submit" name="Submit"value="Submit">

    </div>
</form>