Business Central 2024 wave 2 (BC25): Extend AL interfaces

Dynamics 365 Business Central

The public preview for Dynamics 365 Business Central 2024 release wave 2 (BC25) is available.
Extending AL interfaces in programming languages offers significant business value by enabling flexible and adaptable extensions without altering the core system.
AL interfaces in Business Central 2020 Wave1 (BC16) declare an interface name along with its methods and must be implemented by other objects.
To use a new interface object, create a codeunit that implements the interface and ensure the procedures match the interface object definition.
With BC25, you can extend existing interfaces when declaring an interface, and implementors must also implement all methods from all extended interfaces.
Interfaces are already widely used in standard modules like Email and New sales pricing experience in Dynamics 365 Business Central.
ObsoleteState, ObsoleteReason, and ObsoleteTag properties can help manage interface changes, and new testing and casting operators 'is' and 'as' are introduced in this release.
The article provides code examples illustrating how to create, extend, and use interfaces in Dynamics 365 Business Central.

Registered users can view the full text for FREE!