Worked on stabilizing AvaloniaUI/Avalonia’s data-binding subsystem by addressing a critical OneWay binding propagation issue. Focused on updating the UntypedBindingExpressionBase logic to ensure that source changes consistently propagate to the target, even after local user edits, thereby reducing UI inconsistencies. Scoped the forceUpdate mechanism specifically to OneWay mode and expanded regression and unit tests using SetCurrentValue to validate correct behavior and prevent future regressions. Utilized C# for core development, applying front end development principles and rigorous unit testing practices. These contributions improved the reliability and maintainability of the binding engine, reducing support overhead and enhancing long-term code stability.