1.新建一个Mvc Core项目
注：刚开始依赖项是有黄色三角形，等待安装
2.打开Startup.cs，修改Configure
public void Configure(IApplicationBuilder app, IHostingEnvironment env,ILogger<Startup> logger) ???????{ ???????????if (env.IsDevelopment()) ???????????{ ???????????????app.UseDeveloperExceptionPage(); ???????????} ???????????app.Run(async (context) => ???????????{ ???????????????await context.Response.WriteAsync("Hello World!"); ???????????}); ???????????app.Use(async (context, next) => ???????????{ ???????????????logger.LogInformation("M1 Start"); ???????????????await context.Response.WriteAsync("Hello World!"); ???????????????await next(); ???????????????logger.LogInformation("M1 End"); ???????????}); ???????????app.Run(async (context) => ???????????{ ???????????????logger.LogInformation("M2 Start"); ???????????????await context.Response.WriteAsync("Another World!"); ???????????????logger.LogInformation("M2 End"); ???????????}); ???????}3.选择启动方式 FirstCore
出现：
原理：
参阅：https://v.qq.com/x/page/r0744ix6a9s.html
谢谢Dave
初识MVC Core（一）
原文地址：https://www.cnblogs.com/dzw159/p/10549852.html