Since Business Central 2019 release wave 2 (version 15), the application has become completely AL-based. All functionality that modifies standard business logic must be moved into an Extension. This change influences how upgrades are performed and impacts all the solutions that are still in C/AL, making Dynamics partners consider transitioning to Extensions in AL. In this blog post, we’ll walk you through some of the steps you can take to organize the code in the existing C/AL coding language before the transition. Following these practical advices will facilitate the transition from C/AL to AL, making it as seamless as possible.