Cannot read section from app.config

Question

I have a simple config section as follows

<configuration>
    <configSections>
        <section name="Test" type="System.Configuration.DictionarySectionHandler"/>
        <section name="Test1" type="System.Configuration.DictionarySectionHandler"/>
    </configSections>
    <Test>
        <add key="foo" value="1"/>
    </Test>
    <Test1>
        <add key="bar" value="20"/>
    </Test1>
</configuration>

And I am accessing it from code as

var blah = ConfigurationManager.GetSection("Test");

But I always get null. I tried everything but could not figure out whats going on. Could someone please help me with this?

Thanks,