web.config的連線字串

 <connectionStrings>
    <add name="FlightConnectionString" connectionString="Data Source=.;Initial Catalog=Flixxx;User ID=xxx;Password=xxxxxx" providerName="System.Data.SqlClient"/>
  </connectionStrings>

<?xml version="1.0" encoding="utf-8"?> <!--   如需如何設定 ASP.NET 應用程式的詳細資訊，請造訪   http://go.microsoft.com/fwlink/?LinkId=169433   --> <configuration>   <connectionStrings>     <add name="FlightConnectionString" connectionString="Data Source=.;Initial Catalog=Flixxx;User ID=xxx;Password=xxxxxx" providerName="System.Data.SqlClient"/>   </connectionStrings>   <system.web>     <compilation debug="true" targetFramework="4.0" />   </system.web> </configuration>

寫這篇的意義是什麼？ 意義是什麼？我只知道OO !!