[TOC] <br/><br/><br/> # <b style="color:#4F4F4F;">简介说明</b> ``` 版本：Microsoft.AspNetCore.Hosting 作用：dotnet core web主机构建模块 ``` <br/> # <b style="color:#4F4F4F;">Microsoft.AspNetCore.Hosting.IWebHostBuilder</b> <br/> # <span style="color:#619BE4">UseStartup<>()</span> ***** 使用Startup类直接进行注册配置 <br/> ### *启动周期 <span style="color:red;">1. 举例说明</span>  <br/> # <span style="color:#619BE4">UseUrls()</span> ***** 配置服务监听端口和地址 <br/> # <span style="color:#619BE4">ConfigureServices()</span> ***** 配置服务注册 <br/> # <span style="color:#619BE4">Configure()</span> ***** 配置中间件注册 <br/> # <b style="color:#4F4F4F;">Microsoft.AspNetCore.Hosting.IWebHostEnvironment</b> <br/> # <span style="color:#619BE4">IsDevelopment()</span> ***** 是否为开发环境 <br/>