我无法引用Microsoft。奥温。安全AuthenticationManager,为什么?

我的页面上出现以下错误:

Server Error in '/' Application.

The current type, Microsoft.Owin.Security.IAuthenticationManager, is an interface and cannot be constructed. Are you missing a type mapping? 

我发现我应该把这个代码放进去 Unityconfig.cs 要解决此问题,请执行以下操作:

container.RegisterType<IAuthenticationManager>(
            new InjectionFactory(
                o => System.Web.HttpContext.Current.GetOwinContext().Authentication
            )
        );

但问题是IAuthenticationManager不可见

虽然我添加了 Owin.Security 作为参考,我有

using Microsoft.Owin.Security;

你能给我一些提示吗?