donetcore mvc

IStartupFilter接口的Configure方法就做了一件事，串联委托。将一个委托嵌套在一个新委托里。好比数据结构里面的链表。

public class AutoRequestServicesStartupFilter : IStartupFilter
{
    public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
    {
        return builder =>
        {
            builder.UseMiddleware<RequestServicesContainerMiddleware>();
            next(builder);
        };
    }
}