ASP.Net 5:正在将1.0 Beta8更新为RC1-IServiceCollection不包含AddMvc的定义

我有一些代码，由一个授权api项目、一个通用项目和一个ASP.net主应用程序项目组成，在一个单一的解决方案中。我已经浏览了相关的project.json文件，删除了显式的beta8引用，然后进行了一些其他必要的更正。例如，在必要时将使用Microsoft.Framework.Configuration更改为Microsoft.Extensions.Configuration。

我从链接的潜在重复中了解到，首先要怀疑的是我的各个project.json文件中引用的无效混合。明确地说，我在任何地方都没有留下任何beta8引用。因此，我认为有关的问题并不相同。

我陷入困境的地方似乎是一件非常基本的事情：

Error   CS1061  Build   'IServiceCollection' does not contain a
definition for 'AddMvc' and no extension method 'AddMvc' accepting a first 
argument of type 'IServiceCollection' could be found (are you missing a 
using directive or an assembly reference?)  

我在project.json中引用了Microsoft.AspNet.Mvc，不管我是否在.cs文件中放入"using Microsoft.AspNet.Mvc"，错误仍然存在。我以为你只需将引用添加到project.json中，就可以在新的世界顺序中添加引用。如果project.json存在程序集引用，为什么还会出现这种错误？

我的项目.json:

{
  "webroot": "wwwroot",
  "version": "1.0.0-*",
  "dependencies": {
    "Microsoft.AspNet.Authentication.JwtBearer": "1.0.0-*",
    "Microsoft.AspNet.IISPlatformHandler": "1.0.0-*",
    "Microsoft.AspNet.Mvc": "6.0.0-*",
    "Microsoft.AspNet.Server.Kestrel": "1.0.0-*",
    "Microsoft.AspNet.StaticFiles": "1.0.0-*",
    "Microsoft.Framework.Logging": "1.0.0-*",
    "Microsoft.Framework.Logging.Console": "1.0.0-*",
    "Microsoft.Framework.Logging.Debug": "1.0.0-*",
    "System.IdentityModel.Tokens": "5.0.0-*",
    "MyCompany.Common": "1.0.0-*"
  },
  "commands": {
    "web": "Microsoft.AspNet.Server.Kestrel"
  },
  "frameworks": {
    "dnx451": { }
  },
  "exclude": [
    "wwwroot",
    "node_modules"
  ],
  "publishExclude": [
    "**.user",
    "**.vspscc"
  ]
}

正在中断的代码行是AddMvc代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNet.Builder;
using Microsoft.AspNet.Hosting;
using Microsoft.Framework.DependencyInjection;
using Microsoft.Framework.Logging;
using Microsoft.Extensions.Configuration;
using Microsoft.Dnx.Runtime;
using RamSoft.Authorization.Api.Common;
using System.IdentityModel.Tokens;
using Microsoft.AspNet.Authentication.JwtBearer;
using RamSoft.ITConsole.Common;
using Microsoft.Extensions.PlatformAbstractions;
namespace MyCompany.Authorization.Api
{
    public class Startup
    {
     ...
 public void ConfigureServices(IServiceCollection services)
        {
            services.AddInstance(_signingCredentials);
            services.AddInstance(_jwtBearerOptions);
            services.AddMvc();  // Fail.
        }
   ...
}

"dependencies": {
    "Microsoft.AspNetCore.Authentication.Cookies": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview1-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.FileExtensions": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc2-final",
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
      "version": "1.0.0-preview1-final",
      "type": "build"
    },
    "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
      "version": "1.0.0-preview1-final",
      "type": "build"
    }
  }