Reading from web config file

Hi

When I read from the web configuration file using 'System.Configuration.ConfigurationSettings.AppSettings'

I get following warning:

Warning 1 'System.Configuration.ConfigurationSettings.AppSettings' is obsolete:

'This method is obsolete, it has been replaced by System.Configuration!System.Configuration.ConfigurationManager.AppSettings' 

My issue is that PB does not accept ref. to ConfigurationManager, seems it is not in the 4.0 framework

Any idea?

Thanks!

Regin