This year, the Cologne conference will be held in 3 days , from 24 to 27 April 2017; but if you are waiting for X# content mainly, the first two days will provide all that you need !
I will run two sessions :
. One about MEF extensions : How can you use it to create optional extensions to your applications? Define your feature and make it available as an extension and even extend your Extension. For eg, provide an application that have DBF access only, and replace it with SQL by the change of a module.
. One about .Net everywhere : How you can run you create and run the same application on Windows and on Ubuntu.