29-自己动手构建RequestDelegate管道

1-使用vsCode新建个项目

2-新建RequestDelegate和Context

    public delegate Task RequestDelegate(Context context);

      public class Context{

     }

3-Proggram.cs类

using System;

using System.Collections.Generic;

using System.Threading.Tasks;

namespace MypipleLine

{

    class Program

    {

        private static List<Func<RequestDelegate,RequestDelegate>> _list =

        new List<Func<RequestDelegate, RequestDelegate>>();

        static void Main(string[] args)

        {

              Use((next)=>{

                return (context)=>{

                    Console.WriteLine("");

                    return next.Invoke(context);

                };

            });

            Use((next)=>{

                return (context)=>{

                    Console.WriteLine("");

                    return next.Invoke(context);

                };

            });

            RequestDelegate end = context=>{

                Console.WriteLine("end");

                return Task.CompletedTask;

            };

            _list.Reverse();

            foreach(var middleware in _list)

            {

                end = middleware.Invoke(end);

            }

           end.Invoke(new Context());

        }

        static void Use(Func<RequestDelegate,RequestDelegate> middleware){

            _list.Add(middleware);

        }

    }

}

4-显示结果为