C# .net核心（.net framework）mvc System.MissingMethodException

这是启动代码

{
  "dependencies": {
    "Autofac": "4.6.0",
    "Autofac.Extensions.DependencyInjection": "4.1.0",
    "AutoMapper.Extensions.Microsoft.DependencyInjection": "2.0.1",
    "xx.Service.Core": "1.0.0-*",
    "Akka": "1.2.0",
    "Akka.Remote": "1.2.0",
    "System.Net.Http": "4.3.2",
    "DotNetty.Transport": "0.4.5",
    "DotNetty.Handlers": "0.4.5",
    "DotNetty.Codecs": "0.4.5",
    "DotNetty.Buffers": "0.4.5",
    "DotNetty.Common": "0.4.5",
    "Newtonsoft.Json": "10.0.2",
    "System.Diagnostics.DiagnosticSource": "4.3.1",
    "AutoMapper": "6.1.0",
    "Microsoft.EntityFrameworkCore.Relational": "1.1.2",
    "Microsoft.EntityFrameworkCore.SqlServer": "1.1.2",
    "Microsoft.EntityFrameworkCore.Tools": "1.1.1",
    "Microsoft.AspNetCore.Hosting": "1.1.2",
    "Microsoft.AspNetCore.Http.Abstractions": "1.1.2",
    "Microsoft.AspNetCore.Mvc.ViewFeatures": "1.1.3",
    "xx.Web.Core": "1.0.0-*",
    "Microsoft.Extensions.DependencyInjection": "2.0.0-preview1-final",
    "Microsoft.AspNetCore.Mvc": "1.1.3",
    "Microsoft.AspNetCore.Routing": "1.1.2",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.1.2",
    "Microsoft.AspNetCore.Server.Kestrel": "1.1.2",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.FileExtensions": "1.1.2",
    "Microsoft.Extensions.Configuration.Json": "1.1.2",
    "Microsoft.Extensions.Logging": "1.1.2",
    "Microsoft.Extensions.Logging.Console": "1.1.2",
    "Microsoft.Extensions.Logging.Debug": "1.1.2",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.1.2",
    "Microsoft.EntityFrameworkCore": "1.1.2",
    "Microsoft.Extensions.Logging.Abstractions": "2.0.0-preview1-final",
    "Microsoft.Extensions.DependencyInjection.Abstractions": "2.0.0-preview1-final",
    "Microsoft.Extensions.Configuration": "2.0.0-preview1-final",
    "Microsoft.AspNetCore": "1.1.2"
  },

  "tools": {
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
  },
  "frameworks": {
    "net462": {
      "dependencies": {
        "Anadolum.Shared.Messages": {
          "target": "project"
        }
      }
    }
  },
  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true,
    "copyToOutput": {
      "include": [ "appsettings.json", "rawrabbit.json" ]
    }
  },

  "runtimeOptions": {
    "configProperties": {
      "System.GC.Server": true
    }
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "**/*.cshtml",
      "appsettings.json",
      "web.config",
      "rawrabbit.json"
    ]
  },

  "scripts": {
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
  //,
  //"runtimes": {
  //  "win7-x64": {}
  //}
}

var host=new WebHostBuilder（）
.UseKestrel（）
.UseContentRoot（目录.GetCurrentDirectory（））
.Useii整合（）
.UseStartup（）
.Build（）；
host.Run（）；

我无法修复下面的错误。这是我的package.config文件

“System.MissingMethodException”类型的未处理异常 发生在xxx.exe中

其他信息：找不到方法：“System.IServiceProvider” Microsoft.Extensions.DependencyInjection.ServiceCollectionContainerBuilderExtensions.BuildServiceProvider（Microsoft.Extensions.DependencyInjection.IServiceCollection）“”

---

如何修复它？

您似乎有一个与当前设置不兼容的包，因此，调用缺少的方法失败，但您只提供很少的信息，例如何时发生此错误？var host=new WebHostBuilder（）.UseKestrel（）.UseContentRoot（）（Directory.GetCurrentDirectory（））.UseIISIntegration（）.UseStartup（）.Build（）；host.Run（））；是的，我想我和你一样，但我不知道如何修复它。我跟踪错误消息并修复DLL not found错误上的版本。如何检查哪个版本是正确的？我想知道这个问题是否仍然存在。我遇到了这个问题并解决了它，但不记得是如何解决的。假设它与Autofac和AspnetCore集成连接。你没有跟踪吗他收到Autofac的指令了吗？

var host = new WebHostBuilder()
    .UseKestrel()
    .UseContentRoot(Directory.GetCurrentDirectory())
    .UseIISIntegration()
    .UseStartup<Startup>()
    .Build();
host.Run();