.net – System.Configuration.ConfigurationManager not available

.netconfigurationmanager

In a VS2005 C# project I have added a reference to System.configuration.
In the object browser, I can see the System.Configuration.ConfigurationManager.
In Intellisense System.Configuration only has the old ConfigurationSettings, and not ConfigurationManager.

My code
System.Configuration.ConfigurationManager.AppSettings["MySetting"]

is highlighted as a syntax error and does not compile.

In a different project, the exact same setup works just fine… any clues as to what is going on?

Best Solution

Although the using System.Configuration; command is automatically generated in the using section, for some reason the actual reference is not set.

Go into add reference, .Net tab, and choose System.Configuration.

ConfigurationManager will now be resolved.

If you go to the project where the exact same setup works just fine and look at the references, you will see a reference to System.Configuration.