ConfigurationSection won't convert to NameValueCollection

I have this Q1.config file in my Console Application (.NET 4.5.2)

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <appSettings>
        <add key="globalKey" value="globalValue" />
    </appSettings>

    <configSections>
        <section name="validations" type="System.Configuration.NameValueSectionHandler" />
    </configSections>

    <validations>
        <add key="validationKey" value="validationValue"/>
    </validations>
</configuration>

I'm reading it like this

ExeConfigurationFileMap configFileMap = new ExeConfigurationFileMap { ExeConfigFilename = "Q1.config" };
Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configFileMap, ConfigurationUserLevel.None);
ConfigurationSection validationSettings = config.GetSection("validations");

This works fine:

string globalValue = config.AppSettings.Settings["globalKey"].Value;

But how do I get my "validationKey"? I tried these but they don't work:

validationSettings["validationKey"]
validationSettings.Settings["validationKey"]
(config.GetSection("validations") as NameValueCollection)["validationKey"]