juniorWPF
What is code-behind in WPF?
Updated May 6, 2026
Short answer
Code-behind is the C# file associated with a XAML file containing UI logic.
Deep explanation
It handles events and logic tied directly to UI elements, though MVVM reduces its usage.
Real-world example
Handling button clicks in small utilities or prototypes.
Common mistakes
- Putting business logic in code-behind instead of MVVM.
Follow-up questions
- Why is MVVM preferred over code-behind?