Nested custom configuration section

Question

Hello, I'm trying to access my app.config file which has nested element and I'm unable to do so. I will appreciate any help...

<configSections>

   <section name="settings" type="test1.CustomSettingsConfigSection, test1" />

</configSections>

  <settings>
    <types>
      <type name="type1">
        <add name="testName1" value="testValue1" />
        <add name="testName2" value="testValue2" />
      </type >
      <type name="type2">
        <add name="testName3" value="testValue3" />
        <add name="testName4" value="testValue4" />
      </type >
    </types>
  </settings>