Dynamics CRM 2013 SDK Import CSV

Hello

I am trying to import a csv file using hte CRM dynamics SDK 2013. I keep seeing examples of code using the import class as shown below

Import myimport = new Import();

or

 ImportFile importFile = new ImportFile();

however i cant seem to get these classes referenced. Were these introduced in later versions of the sdk? if yes is there another way to achieve the same effect. Essentially i wana take  a csv file and import it into dynamics using the sdk 2013. It would help if it can use an existing data map to make the import code shorter.

regards