Business Central 2024 wave 2 (BC25): Type testing and casting operators for interfaces (‘is’ operator and ‘as’ operator)

Dynamics 365 Business Central

Dynamics 365 Business Central 2024 release wave 2 (BC25) public preview is available.
Type testing and casting operators for interfaces are introduced in AL language.
'is' and 'as' operators are added to check and cast interfaces, improving extensibility and code safety.
AL interfaces are syntactical contracts for nonabstract methods in Business Central.
Interfaces must be implemented by codeunits using the 'implements' keyword.
Errors will occur if interface methods are not correctly implemented.
New operators 'is' and 'as' allow for testing and casting between AL interfaces.
Additional features such as the ternary operator and 'this' keyword are also introduced in BC25.

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