private static ConfigurationPropertyCollection EnsureStaticPropertyBag() {
if (s_properties == null) {
s_propAppSettings = new ConfigurationProperty(null, typeof(KeyValueConfigurationCollection), null, ConfigurationPropertyOptions.IsDefaultCollection);
s_propFile = new ConfigurationProperty("file", typeof(string), String.Empty, ConfigurationPropertyOptions.None);
ConfigurationPropertyCollection properties = new ConfigurationPropertyCollection();
properties.Add(s_propAppSettings);
properties.Add(s_propFile);
s_properties = properties;
}
return s_properties;
}