EntLib–Logging–SwitchValues

Here are the list of values that you can use for the SwitchValue for the configuration of the logging block in Enterprise Library.

Value	Description
ActivityTracing	Allows the Stop, Start, Suspend, Transfer, and Resume events through.
All	Allows all events through.
Critical	Allows only Critical events through. A critical event is a fatal error or application crash.
Error	Allows Critical and Error events through. An Error event is a recoverable error.
Information	Allows Critical, Error, Warning, and Information events through. An information event is an informational message.
Off	Does not allow any events through.
Verbose	Allows Critical, Error, Warning, Information, and Verbose events through. A Verbose event is a debugging trace.
Warning	Allows Critical, Error, and Warning events through. A Warning event can indicate both critical and non-critical issues.

MSDN: http://msdn.microsoft.com/en-us/library/ff664426(v=PandP.50).aspx