Add version Tag to Dokuments inside Sharepoint 2013 - Sandbox Solution

Hey Guys,

i´m trying to add the SharePoint Version tag inside of a Document using an Event Receiver.

But i can´t find anything that might help me how to work this out in SharePoint 2013 using c# and inside of a Sandboxsolution.

I´m really greatfull for any help

Thanks a lot

Mady