asp.net-core – 程序集中找不到入口点’Microsoft.EntityFramew

编辑：

随着时间的推移给我另一个错误,从我可以告诉的问题是微软更新了他们的设计包而不是他们的工具包,所以两者都不能一起工作,因为如果你按照他们的教程,它应该得到你得到的最新包遵循它的错误.

我通过强制两个包到1.0.0-preview2-final来解决它.
我更新的project.json：

{
  "buildOptions": {
    "emitEntryPoint": true,"preserveCompilationContext": true
  },"dependencies": {
    "Microsoft.AspNetCore.Session": "1.0.0","Microsoft.AspNetCore.Mvc": "1.0.1","Microsoft.AspNetCore.Server.IISIntegration": "1.0.0","Microsoft.AspNetCore.Server.Kestrel": "1.0.1","Microsoft.AspNetCore.StaticFiles": "1.0.0","Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0","Microsoft.Extensions.Configuration.FileExtensions": "1.0.0","Microsoft.Extensions.Configuration.Json": "1.0.0","Microsoft.Extensions.Logging": "1.0.0","Microsoft.Extensions.Logging.Console": "1.0.0","Microsoft.Extensions.Logging.Debug": "1.0.0","Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0","Microsoft.NETCore.App": "1.0.1","System.Runtime": "4.1.0","Newtonsoft.Json": "9.0.1","DataAccess": "1.0.0-*","Entities": "1.0.0-*","Microsoft.EntityFrameworkCore.SqlServer": "1.0.1","Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final","Microsoft.EntityFrameworkCore.Design": "1.0.0-preview2-final"
  },"frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6","portable-net45+win8"
      ]
    }
  },"publishOptions": {
    "include": [
      "wwwroot","appsettings.json","web.config"
    ]
  },"runtimeOptions": {
    "configProperties": {
      "System.GC.Server": true
    }
  },"runtimes": {
    "win10-x64": {},"win8-x64": {},"win7-x64": {}
  },"scripts": {
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  },"tools": {
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final","Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
  }
}