Application configuration file is not updating in worker role

Question

In my application I have to change few app setting and some other section values programmatically.

Some thing like this

XDocument configXML= XDocument.Parse(Assembly.GetExecutiongAssembly().Location + ".Config");

// Some changes to appSetting Section . //

ConfigurationManager.RefreshSection("appSettings");

But appSetting values not updating in Azure environment, it works DevFabric and Winapp and console app as well.

Advance thanks!!