以前app.config中只有(appSettings)數據庫連接，在后面加上log4net的配置之后，數據庫連接報錯：““DBUtility.DbHelperMySQL”的類型初始值設定項引發異常?！?，而把log4net的配置放在 appSettings前面就沒問題.原始app.config<?xml version="1.0" encoding="utf-8" ?><configuration>  <configSections>  <appSettings>    <add key="ConStringEncrypt" value="false"/>    <add key="ConnectionString" value="server=11.11.11.11;database=111;uid=root;pwd=111"/>  </appSettings></configuration> log4net的兩塊 <configSections>    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />  </configSections>  <log4net>......</lot4net> 這兩塊在appsettings上面不報錯，下面報錯。哪位牛牛能解釋下？