MB-500: What Is the Best Approach to Add Custom Logic in Dynamics 365 Without Modifying Base Code?

Question

You are working on the company’s Dynamics 365 finance and operations apps implementation. You need to extend the functionality of a base class method without modifying the base code.

You need to implement a solution that allows you to add custom logic before and after the base method execution.

Which approach should you use?

Select only one answer.

A. Implement Chain of Command (CoC) in an extension class
B. Use event handlers only
C. Create a new class with the same method
D. Modify the base class method directly

Answer

A. Implement Chain of Command (CoC) in an extension class

Explanation

Chain of Command (CoC) allows you to wrap X++ code around methods that are defined in the base class. This allows you to add custom logic that will run before and/or after the standard code runs. Modifying the base class method directly is not recommended as it can lead to issues during updates. Creating a new class with the same method does not extend the base class functionality. Using event handlers only does not allow adding custom logic before and after the base method execution.

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