can not type implicity how to solve it

Question

using MyWealthFirst.Models;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

namespace MyWealthFirst.Controllers

{

public class HomeController : Controller

{

//

// GET: /Home/

CompanyContext CompanyContext = new CompanyContext();

public ActionResult Home()

{

return View();

}

public ActionResult About()

{

return View("");

}

public ActionResult Details(int id)

{

CompanyContext company = CompanyContext.Companyes.Single(c => c.id == id);

return View(CompanyContext);

}

}

}