TreatControlCAsInput issue. Is this a bug?

It is a known issue with the Windows Console subsystem and has been reported on Microsoft Connect back in 2006.

Posted by Microsoft on 22/05/2007 at 12:37

Hello ARos, Thank you for reporting this issue in System.Console. The behavior exists with the Windows Console subsystem, as demonstrated with the attached Win32 C application. I have reported the issue to the Windows Console subsystem owner.

Thanks, Josh

Not a bug on the Framework but it looks like a bug in the Windows console subsystem.