- 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.
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