Is buffer spills over still a problem? C /CLI safety codes

The program uses Microsoft Visual C 2005 to compile, shut buffer safety to check option (/ GS- ) , opened mandatory and patulous (/ Clr) . Below acquiescent circumstance, buffer safety is checked is opened, shutting it is not a good way (be shown like this exemple) , and / Clr option can allow by mandatory reach be not mandatory code to make compound order part.