Rename this enumeration to match the regular expression: '^([A-Z]{1,3}[a-z0-9]+)*([A-Z]{2})?$'.

Replace this lock on 'DirectoryInfo' with a lock against an object that cannot be accessed across application domain boundaries.

Indexing at Count-1 should be used instead of the "Enumerable" extension method "Last"

Remove the unused local variable 'exceptionMsg'.

Rename this enumeration to match the regular expression: '^([A-Z]{1,3}[a-z0-9]+)*([A-Z]{2})?$'.

Replace this lock on 'DirectoryInfo' with a lock against an object that cannot be accessed across application domain boundaries.

Indexing at Count-1 should be used instead of the "Enumerable" extension method "Last"