NI VISA Driver GetAttribute and SetAttribute Methods Unavailable using C#

[lme3623]

I have currently installed the drivers for NI VISA including the .Net languages portion.  I am writing a driver for GPIB and in when creating a Session all of the SetAttribute and GetAttribute methods (i.e. corresponding to viGetAttribute and viSetAttribute) remain disabled.  Is this functionality not available yet or is there something else I need to do to enable it? 

[lme3623]

See this thread "How do you set the number of start bits for a VISA serial session?"

The methods are available but they are "hidden" so they may not show up in the autofill functionality.