1-构建路由

public class Startup    {        // This method gets called by the runtime. Use this method to add services to the container.        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940        public void ConfigureServices(IServiceCollection services)        {            services.AddRouting(); //如果采用第一种方式，必要加上些条命令        }        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.        public void Configure(IApplicationBuilder app, IHostingEnvironment env)        {            if (env.IsDevelopment())            {                app.UseDeveloperExceptionPage();            }           //第一种方式            app.UseRouter(myhandler=>{                myhandler.MapGet("action",context=>context.Response.WriteAsync("this is action") );            });          //第一种方式，自己构建route            RequestDelegate handler = context =>  context.Response.WriteAsync("i am router");             var router = new Route(                new RouteHandler(handler),                "myaction",                app.ApplicationServices.GetRequiredService
     
      ()                 );            app.UseRouter(router);            //第二种方式            app.Map("/task",taskApp=>{ //路由匹配                taskApp.Run(async (context)=>{                    await context.Response.WriteAsync("i am task");                });            });        }    }