C# => 写法

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>();

        public static IWebHostBuilder CreateWebHostBuilder(string[] args)
        {
            return WebHost.CreateDefaultBuilder(args).UseStartup<Startup>();
        }

 Action<object> action =
           //函数参数
            (object obj)
            =>
            //函数体
            {
                Console.WriteLine("");
            };

       public void action <T>(object obj)
        {
            Console.WriteLine("");
        }
        public void test()
        {
            Action<object> action = new Action<object>(action<object>);
            action(new object()); //执行
        }

  //我的自定义委托
        public delegate Task Request_Delegate(HttpContext context);
        //我的自定义函数
        public Task My_Function(HttpContext context)
        {
            return context.Response.WriteAsync("");
        }

  /*
             写法1
             */
            app.Run(
                async (context)
                =>
                {
                    await context.Response.WriteAsync("Hello World!_001");
                }
            );
            /*
             写法 2
             */
            test(app);

            app.Run(
                 (context)     // 类似于匿名函数
                 =>
                 {
                     return context.Response.WriteAsync("Hello World!");
                 }

#region --定义带参数的委托
        //定义一个委托
        public delegate TResult My_Func001<in T1, in T2, out TResult>(T1 arg1, T2 arg2);
        public delegate string My_Func0011<in T1, in T2, out TResult>(T1 arg1, T2 arg2);
        public string  my_func001<T1,T2>(int a,int b)
        {
            MessageBox.Show("");
            return "";
        }
        /*
         My_Func001<int, int,string> my_Func001 = my_func001<int, int>;
         my_Func001(1,2); 

        My_Func0011<int, int, string> my_Func001 = my_func001<int, int>;
        my_Func001(1, 2);

          */

        public delegate void My_Func002<in T1, in T2>(T1 arg1, T2 arg2);
        public void my_func002<T1,T2>(T1 a,T2 b){}
        /*
        My_Func002<int,int> my_Func002 = my_func002<int, int>;
        my_Func002(10,11);
         */
        #endregion

        #region --定义无参数的委托
        public delegate void My_Func003<in T1, in T2>(); //无参数
        public void my_func003()
        {
            MessageBox.Show("");
        }
        public void my_func003<T>()
        {
            var t = typeof(T);
            MessageBox.Show("003<T>" + t.Name);
        }
        public void my_func003<T1, T2>()
        {
            var t = typeof(T1);
            MessageBox.Show("003<T1,T2>" + t.Name);
        }
        /*
         调用
           //声明委托
            My_Func003<int, int> my_Func003 = my_func003;
            My_Func003<int, int> my_Func003_1 = my_func003<String>;
            My_Func003<int, int> my_Func003_12 = my_func003<String, String>;
            //执行委托
            my_Func003();
            my_Func003_1();
            my_Func003_12();
        */

        #endregion

//研究中e......

namespace WebApplication1.lib
{
    //定义一个接口
    public interface My_IApplicationBuilder
    {
        My_IApplicationBuilder Use(Func<RequestDelegate, RequestDelegate> middleware);
    }
    public static class A
    {
        // public delegate TResult Func<in T, out TResult>(T arg);

        public static T test<T>(T a)
        {
            T temp = default(T);

            return temp;
        }
        public static My_IApplicationBuilder testc(this My_IApplicationBuilder app, string str)
        {

            Func<RequestDelegate, RequestDelegate> middleware = test<RequestDelegate>;
            //执行这个函数
            //return app.Use(middleware); //函数当参数传递过去

            //委托赋值方式 2
            Func<RequestDelegate, RequestDelegate> middleware1 = delegate (RequestDelegate next)
            {

                //返回方法001
                MethodInfo[] array = new MethodInfo[] { };
                MethodInfo methodInfo = array[];
                return (RequestDelegate)new object();

            }; //匿名方法

            return app.Use(middleware1); //函数当参数传递过去
        }

    }
}

gg了

.net core    如何获取 每次请求URL    比如  http://localhost:62830/h        http://localhost:62830/a.txt     http://localhost:62830/a.jpg   http://localhost:62830/a     http://localhost:62830/b

服务器如何获取 每次的请求连接?????

         //app.Run(My_Function);  // 放在 app.UseMvc 之后，将捕获不到控制器页面       捕获所有请求

 ////我的自定义函数
        //public async Task My_Function( HttpContext  context)
        //{
        //    //RequestHandleHelper request = new RequestHandleHelper(context.Request);
        //    //var t = ; //请求路径

        //    var path = context.Request.Path.Value;
        //    var met = context.Request.Method;

        //    //包含的文件扩展名
        //    if (path=="1")
        //    {
        //        //context.Response.Redirect(path);
        //        //await context.Response.WriteAsync("Hello, World!");
        //    }
        //    else if(path== "/123")
        //    {
        //       context.Response.Redirect("/Home/Error");
        //    }
        //}

//其他委托

 //定义一个接口
    public interface My_IApplicationBuilder
    {
        My_IApplicationBuilder Use(Func<RequestDelegate, RequestDelegate> middleware);
    }
    public static class A
    {
        // public delegate TResult Func<in T, out TResult>(T arg);

        public static T test<T>(T a)
        {
            T temp = default(T);

            return temp;
        }
        public static My_IApplicationBuilder testc(this My_IApplicationBuilder app, string str)
        {

            Func<RequestDelegate, RequestDelegate> middleware = test<RequestDelegate>;
            //执行这个函数
            //return app.Use(middleware); //函数当参数传递过去

            //委托赋值方式 2
            Func<RequestDelegate, RequestDelegate> middleware1 = delegate (RequestDelegate next)
            {

                //返回方法001
                MethodInfo[] array = new MethodInfo[] { };
                MethodInfo methodInfo = array[];
                return (RequestDelegate)new object();

            }; //匿名方法

            return app.Use(middleware1); //函数当参数传递过去
        }

    }