Understanding Web.Config *RESOLVED*

[fungi]

I'm using the config file for storing some application-wide settings. So I have an entry like this in web.config:

<appSettings>
&nbsp&nbsp<add key="A" value="whatever" />
</appSettings>

I then grab the value for a key like like this:

ConfigurationSettings.AppSettings("A")

Nothing special so far...

But what I've also got is a web app nested within another web app, so it kind of looks like:

Parent Virtual Directory
&nbsp;&nbsp;Web.Config (Key="A"...)
&nbsp;&nbsp;Parent.aspx
&nbsp;&nbsp;Child Virtual Directory
&nbsp;&nbsp;&nbsp;&nbsp;Web.Config (Key="B"...)
&nbsp;&nbsp;&nbsp;&nbsp;Child.aspx

The behavior I'm seeing is the Child code can retreive a config setting defined at the parent level. In other words in the above example, child.aspx can make 2 calls :

ConfigurationSettings.AppSettings("A")
ConfigurationSettings.AppSettings("B")

and get a value for each, but each value is coming from a different config file.

Is this legitimate stuff? Understanding better will really help me out. Thanks!