c#属性/设置在更改项目名称和命名空间后未定义

我正在更新几年前构建的旧应用程序，全局命名空间和project.cs文件和主表单都命名为email2case_winForm

我想改变这一点(同时以更面向对象的方式重建应用程序，使其更灵活，并能够重用代码)，因此将名称更改为email2case

但是现在我在编译时遇到了麻烦，因为在读取项目的设置和属性时，无法找到这些成员。

这里是我试图用来读取属性的代码的一个例子。设置:

XElement x = XElement.Load(email2case.Properties.Settings.Default.e2cConfigFile);

的编译错误是:

email2case。email2case'不包含'Properties'的定义

下面是一个类如何从全局设置中读取的:

this.Url = global::email2case.Settings.Default.email2case_sforce_SforceService;

的编译错误是:

类型或名称空间名称'Settings'在名称空间'email2case'中不存在(您是否缺少程序集引用?)

我有一种预感，问题是由app.Config中的定义引起的，下面是:

<configuration>
    <configSections>
        <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
            <section name="email2case.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
            <section name="email2case.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
        </sectionGroup>
        <sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
            <section name="email2case.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
        </sectionGroup>
    </configSections>
    <applicationSettings>
      <email2case.Properties.Settings>
        <setting name="email2case_sforce_SforceService" serializeAs="String">
          <value>https://login.salesforce.com/servi...</value>
        </setting>
        <setting name="e2cConfigFile" serializeAs="String">
          <value>C:'email2case'data'e2cConfig.xml</value>
        </setting>
      </email2case.Properties.Settings>
      <email2case.Properties.Settings>
        <setting name="email2case_sforce_SforceService" serializeAs="String">
          <value>https://login.salesforce.com/serv...</value>
        </setting>
      </email2case.Properties.Settings>
    </applicationSettings>
    <system.serviceModel>
        <bindings/>
        <client/>
    </system.serviceModel>
    <startup>
      <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup><userSettings>
        <email2case.email2case.Properties.Settings>
            <setting name="enableEWSTrace" serializeAs="String">
                <value>False</value>
            </setting>
            <setting name="attachmentsPathLocal" serializeAs="String">
                <value>C:'email2case'temp'</value>
            </setting>
            <setting name="eTracePath" serializeAs="String">
                <value>C:'email2case'Trace'</value>
            </setting>
            <setting name="ewsTraceKeepDays" serializeAs="String">
                <value>1</value>
            </setting>
        </email2case.email2case.Properties.Settings>
    </userSettings>
</configuration>

我不想在不知道正确方法的情况下编辑它，所以我应该使用什么代码来引用我的属性和设置?

或者我应该改变它们在app.config中的定义方式吗?