commandline
                                
                                 commandline copied to clipboard
                                
                                    commandline copied to clipboard
                            
                            
                            
                        Removed "sealed" from OptionAttribute
This PR is for Issue #859, where I requested that sealed be removed from OptionAttribute to allow for derived attribute types that will be shared among verbs, such as [LogFileAttribute(Required = false)] - this was all elaborated in the Issue entry.
I've been using this version since June, not a single hitch.