Hi Ram,
We currently do not support EF6. I know we support 4.5 with the last drop of the SDK 16.x. Engineering is currently working on EF 5 support.
MVC5 came with Studio 2013. We are certified with Studio 2012 with the last drop of the SDK 16.x.
So the newer features of Studio 2013 haven't been tested as of yet.
You can still use ado.net layer. I would say go with Studio 2012 and EF 4.5 to build your project.
With our driver to use the capabilities I would say instead of using SqlConnection you use AseConnection>
Here is a list of specific API reference for connecting to ASE with our ADO.NET driver:
Sybase Books:
Thanks,
Dawn