c# - 无法将 Autofac 添加到 .Net Core 中的 ServiceCollection

Question

我想将 Autofac 添加到 .Net Core 应用程序。我已尝试完成 Autofac:Getting started tutorial 中的所有步骤，我安装了 Autofac.Extensions.DependencyInjection，更新了 Program 类，但无法像示例中那样添加 autofac。

获取错误

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

重新安装 nuget 包，清理并重建解决方案，关闭 VS - 这些都没有帮助。

---

public class Program
{
  public static void Main(string[] args)
  {
        var host = new WebHostBuilder()
            .UseKestrel()
            .ConfigureServices(services => services.AddAutofac()) //here is problem
            .UseContentRoot(Directory.GetCurrentDirectory())
            .UseIISIntegration()
            .UseStartup<Startup>()
            .Build();

        host.Run();
  }
}

---

Autofac 版本 - 4.6.2Autofac.Extensions.DependencyInjection 版本 - 4.2.0

Answer 1

尝试添加 using Autofac.Extensions.DependencyInjection;

using System.IO;
using Autofac.Extensions.DependencyInjection;
using Microsoft.AspNetCore.Hosting;

namespace App
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var host = new WebHostBuilder()
                .UseKestrel()
                .ConfigureServices(services => services.AddAutofac()) 
                .UseContentRoot(Directory.GetCurrentDirectory())
                .UseIISIntegration()
                .UseStartup<Startup>()
                .Build();

            host.Run();
        }
    }
}