[TOC] <br/><br/><br/> # <b style="color:#4F4F4F;">簡介說明</b> ``` 版本：Microsoft.AspNetCore.Hosting 作用：dotnet core web主機構建模塊 ``` <br/> # <b style="color:#4F4F4F;">Microsoft.AspNetCore.Hosting.IWebHostBuilder</b> <br/> # <span style="color:#619BE4">UseStartup<>()</span> ***** 使用Startup類直接進行注冊配置 <br/> ### *啟動周期 <span style="color:red;">1. 舉例說明</span>  <br/> # <span style="color:#619BE4">UseUrls()</span> ***** 配置服務監聽端口和地址 <br/> # <span style="color:#619BE4">ConfigureServices()</span> ***** 配置服務注冊 <br/> # <span style="color:#619BE4">Configure()</span> ***** 配置中間件注冊 <br/> # <b style="color:#4F4F4F;">Microsoft.AspNetCore.Hosting.IWebHostEnvironment</b> <br/> # <span style="color:#619BE4">IsDevelopment()</span> ***** 是否為開發環境 <br/>