CultureDetector
CultureDetector is a helper class used by NUnit to determine
            whether a test should be run based on the current culture.
            
                
Return the last failure reason. Results are not
            defined if called before IsSupported( Attribute )
            is called.
            
public CultureDetector()
Default constructor uses the current culture.
            
Construct a CultureDetector for a particular culture for testing.
            
Test to determine if one of a collection of cultures
            is being used currently.
            
Tests to determine if the current culture is supported
            based on a culture attribute.
            
Test to determine if the a particular culture or comma-
            delimited set of cultures is in use.