Thank you Saad. So if i decide to use unmanaged RAS, i will make use of CrystalDecisions.CrystalReports.Engine.ReportDocument.
I've searched that CR 2013 doesn't include any dll and the Crystal Server 2013 doesn't have the above dll too. If i install the CR for VS, i will get the dll in version 13. Where can i get the dll in version 14? Any idea?