winform 项目获取app.config 中appSettings节点数据

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
            <section name="StartUpgrade.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
        </sectionGroup>
    </configSections>
  <appSettings>
    <!-- checkin 文件夹和文件名 -->
    <add key="checkin-filefolder" value="D:NotePad++"/>
    <add key="checkin-filefolder-name" value="npp.6.1.3.Installer.exe"/>
    
    <!-- 出钞 文件夹和文件名 -->
    <add key="outmoney-filefolder" value="D:NotePad++"/>
    <add key="outmoney-filefolder-name" value="npp.6.1.3.Installer.exe"/>
    
    <!-- 入钞 文件夹和文件名 -->
    <add key="inmoney-filefolder" value="D:NotePad++"/>
    <add key="inmoney-filefolder-name" value="npp.6.1.3.Installer.exe"/>
    
    <!-- 字节数组 -->
    <add key="bytearrary" value="10240"/>
    <add key="upload-path" value="E:ProjectsHotelsStartUpgradeStartUpgradeFile"/>
    <add key="upload-url" value="http://192.168.1.200:8077/UpgradeFiles/"/>
  </appSettings>
    <system.serviceModel>
      <bindings />
      <client />
    </system.serviceModel>
    <applicationSettings>
      <StartUpgrade.Properties.Settings>
            <setting name="StartUpgrade_IStartUpgrade_UpgradeFile" serializeAs="String">
                <value>http://192.168.1.155:8013/DataService/WebService/Interface/UpgradeFile.asmx</value>
            </setting>
        </StartUpgrade.Properties.Settings>
    </applicationSettings>
 
</configuration>

然后在winform中cs文件里这样调用：

        /// <summary>
        /// 获取配置文件里appsettings的数据
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public string GetAppsettingStr(string str)
        {
            AppSettingsReader appReader = new AppSettingsReader();
            return appReader.GetValue(str, typeof(string)).ToString();
        }