Implementing Interfaces in AL for Dynamics 365 Business Central

As Dynamics 365 Business Central solutions grow, writing rigid, tightly coupled code makes updates and customization highly complex. Mastering interfaces in AL allows you to build modular, flexible applications that adapt easily to changing business requirements. This written course guides you from the fundamental concepts of object-oriented interfaces to practical implementation within Business Central. You will learn how to decouple your business logic, write cleaner code, and design robust integration points that make your custom extensions future-proof. What you'll learn: - Understand the foundational concepts of interfaces and polymorphism in AL programming - Declare and implement interface objects to decouple codeunit logic - Apply the Strategy Pattern to dynamically select different business logic implementations at runtime - Configure extensible design patterns that allow other developers to safely extend your custom solutions - Practice writing clean, modular AL code that aligns with modern SaaS development standards We begin with basic terminology and the core syntax of the interface object in AL. From there, you will read through step-by-step implementation scenarios, exploring how to use interfaces alongside codeunits, enums, and extensibility patterns. This course is designed for developers who are familiar with basic Business Central development and want to elevate their software design practices. No prior experience with interfaces is required. Start reading today to unlock the power of polymorphic programming in Business Central.