引用web service时，出现无法识别的配置节点applicationSettings

ApplicationSetting 节点的内容：

<applicationSettings>
        <MyWeb.Properties.Settings>
            <setting name="MyWeb_EducationServiceService"
                serializeAs="String">
                <value>http://172.27.35.10:8080/dataexchangeweb/ws/EducationService</value>
            </setting>
            <setting name="MyWeb_DataExchangeService_EducationServiceService"
                serializeAs="String">
                <value>http://10.0.0.11:8080/exchangeserviceweb/ws/EducationService</value>
            </setting>
        </MyWeb.Properties.Settings>
    </applicationSettings>

仔细核对代码，原来在引用web service时, 配置节点configSections, 中的内容也添加了一行：

<configSections>
　　<sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
      <section name="MyWeb.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </sectionGroup>
</configSections>