new project in mvc4 but in the case of controller return view() is not working

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C#

i have create a new project in mvc4 but in the case of controller return view() is not working,the following code is give below..what is the reason please help me

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using System.Web.Mvc;

namespace authe.Controllers
{
    public class auController : ApiController
    {
        public ActionResult index()
        {
            return View();//error is the name view does not exist in the current context
        }
    }
}