wpf & .config files

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Everyone:

I'm trying to read app settings from my configuration file. The code works
fine in winform but doesn't return anything in wpf. No error is thrown.

This code is:
public string GetMSSQLConnect ionString()
{
return
System.Configur ation.Configura tionSettings.Ap pSettings["MsSqlConnectio nString"];
}

the [app].exe.config contains:

<?xml version="1.0" encoding="utf-8" ?>
<configuratio n>
<appSettings>
<add key="MsSqlConne ctionString" value="Data
Source=(local)\ sqlexpress;Inte grated Security=SSPI;I nitial Catalog=TEST;" />
</appSettings>
</configuration>

I've done some searching and can't find anything about this. Thanks for the
help.

Sincerely,
Dale