A library that exposed two methods for retrieving possible extensions.

GetFileExtensionFromMimeType : Retrieves the first valid extension for a specific mime type. (If the mime type is not censored among known ones it splits the mime type with "/" and returns the last value)

GetMultipleFileExtensionFromMimeType : Retrieves a text list with all possible extensions for a specific mime type. ( If the mime type is not censored among known ones it returns ".file" )

This version handles 301 mime types.