In reply to vinod.

When you're running with EG 7.1, the 7.1 version of the Toolkit DLL will be loaded. So that's the version that will be returned. (DO NOT deploy the SAS.Tasks.Toolkit.dll with your custom task -- it should always be using the version that ships with the version of EG that's running, even if you built the task by referencing the 4.3 version.)