What is the primary programming language used for Microsoft Dynamics 365 extensions?

The primary programming language used for Microsoft Dynamics 365 extensions is X++. This language is specifically designed for developing custom business logic in the Dynamics 365 environment, particularly within the finance and operations modules. X++ incorporates elements from both C# and Java, providing a familiar syntax for developers who may have experience with these languages.

X++ is tightly integrated with the application, enabling developers to create and manage data models, build user interfaces, and implement business processes efficiently. Its object-oriented nature allows for encapsulation, inheritance, and polymorphism, which are essential for a robust development framework.

This language is essential for writing server-side operations, working with data entities, and implementing business rules within Dynamics 365. As such, understanding and utilizing X++ is crucial for any developer looking to extend or customize Dynamics 365 applications effectively.