Modernizing a Legacy .NET Framework Application

Introduction
Many organizations still rely on legacy .NET Framework apps. I recently worked on modernizing a 10-year-old desktop application, improving performance and user experience while ensuring backward compatibility.

Main Body

• Problem Statement: Legacy app was difficult to maintain, lacked modern UI/UX, and had performance bottlenecks.
• Approach Taken:
  • Migrated from .NET Framework 4.5 to .NET 6.
  • Refactored monolithic codebase into modular components.
  • Replaced Windows Forms with WPF + MVVM architecture.
• Key Enhancements:
  • Dependency Injection for maintainability.
  • Asynchronous programming with async/await for responsiveness.
  • Integrated REST APIs for external services.
• Challenges Faced: Compatibility issues with third-party libraries, resolved through NuGet updates.
• Results: Improved load times by 60% and reduced memory usage significantly.

Conclusion
Modernization is not just about upgrading code; it’s about future-proofing applications while maintaining business continuity.