如何强制VS 2013从头开始为ASP .NET MVC 5项目重建数据库

Question

必须采取哪些步骤来强制Visual Studio和Entity Framework删除当前使用的数据库，然后根据ASP的模型目录中的类从头开始生成它。 NET MVC 5项目？

编辑：如果有必要，我会重复：从头开始。

EDIT2：我的Global.asax

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using WebApplication2.Migrations;
using WebApplication2.Models;


namespace WebApplication2 {
    public class MvcApplication : System.Web.HttpApplication {
        protected void Application_Start() {

            Database.SetInitializer(new MigrateDatabaseToLatestVersion<PersonContext, Configuration>()); 
            Database.SetInitializer(new DropCreateDatabaseAlways<PersonContext>());
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }
    }
}

WebConfig的一部分

<entityFramework>
    <contexts>
     <context type="WebApplication2.Models.PersonContext, WebApplication2">
        <databaseInitializer type="WebApplication2.Models.PersonInitializer, WebApplication2" />
      </context>
    </contexts>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>