Question

I just opened up a project I have done in MVC a while back, fired right up I looked at in the browser and now all of the sudden it just won’t find the [HttpPost] & [HttpPostAttribute]. What can be the problem?

error message

The type or namespace name ‘HttpPost’ could not be found (are you missing a using directive or an assembly reference?)

EDIT:

If I comment out the [HttpPost] I get that global is missing the UrlParameter and AreaRegistration?

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Security.Principal;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.Security;
using PROJECT.Web.Models;

Answer 1

I would create a new ASP.NET MVC project. If this project fails you have deinstalled some needed parts, if it works your existing project is screwed up.