create your own settings in xml

AllowUserToChangePanelLayout
AllowUserToDeleteCompany

<appSettings>
    <add key="ConnString" value="my conn string" />
    <add key="MaxUsers" value="50" />
</appSettings>

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <appSettings file="ExternalWeb.config">
        <add key="MyKey" value="MyValue" />
    </appSettings>
</configuration>

System.Configuration.ConfigurationManager.AppSettings["myKey"];

public static class mySettings
{
    public enum SettingsType
    { UserPermitions, WebService, Alerts }
    public enum SectionType
    { AllowChangeLayout, AllowUserDelete, MaximumReturnsFromSearch, MaximumOnBatch, SendTo }

    public static String GetSettings(SettingsType type, SectionType section)
    {
        return
            ConfigurationManager.AppSettings[
                String.Format("{0}_{1}",
                    Enum.Parse(typeof(SettingsType), type.ToString()).ToString(),
                    Enum.Parse(typeof(SectionType), section.ToString()).ToString())
            ];
    }
}

<configuration>
  <appSettings file="myApp.config">
    <add key="UserPermitions_AllowChangeLayout" value="" />
    <add key="UserPermitions_AllowUserDelete" value="" />

    <add key="WebService_MaximumReturnsFromSearch" value="" />

    <add key="Alerts_SendTo" value="" />
    <add key="Alerts_MaximumOnBatch" value="" />
  </appSettings>
</configuration>

<?xml version="1.0" encoding="utf-8" ?>
<!--
###
### This file serves the propose of a quick configuration.
### Administrator can either change this values directly or use the
###   Settings tab in the application.
###
-->
<appSettings>

  <!-- *** User Access Configuration *** -->
  <!-- Allow user to change the panels layout {1: Yes} {0: No} -->
  <add key="UserPermitions_AllowChangeLayout" value="1" />
  <!-- Allow user to delete a company fro monitoring -->
  <add key="UserPermitions_AllowUserDelete" value="1" />

  <!-- *** Web Service configuration *** -->
  <!-- Maximum responses from the search service -->
  <add key="WebService_MaximumReturnsFromSearch" value="10" />

  <!-- *** Allerts configuration *** -->
  <!-- Send the alerts to the email writeen below -->
  <add key="Alerts_SendTo" value="[email protected]" />
  <!-- Send an alert when user import more than the number bellow -->
  <add key="Alerts_MaximumOnBatch" value="10" />

</appSettings>

p.value = mySettings.GetSettings(
             mySettings.SettingsType.WebService,
             mySettings.SectionType.MaximumReturnsFromSearch);