Browse categories
Explore
Fiverr Pro
English
$
USD
I will modernize and upgrade your legacy c sharp, dot net windows desktop application
Hemant Vijay
About this gig
Stuck on an unsupported .NET framework? Upgrade safely without breaking your app.
Hello! I'm an experienced .NET developer specializing in legacy software modernization, C# code refactoring, supported framework upgrades, dependency updates & compatibility testing for Windows desktop applications.
I help businesses, startups & independent developers upgrade their aging desktop software into clean, maintainable & fully supported applications quickly, safely & with minimal disruption to their operations.
What this gig includes:
- Full assessment of your legacy C# .NET Windows desktop application
- Upgrade to a currently supported .NET framework version
- Code refactoring for cleaner, more maintainable, and more readable code
- Dependency and third-party library updates
- Removal of deprecated APIs & outdated code patterns
- Compatibility testing to ensure your app runs smoothly after upgrades
- Performance and stability improvements
- Clear documentation of changes made & guidance for future maintenance
Order now and get your legacy desktop application modernized, future-proofed, and running on a supported framework, done right the first time!
Get to know Hemant Vijay
Hemant Vijay
Full Stack Developer
- FromIndia
- Member sinceMay 2025
Languages
Kannada, English, Tamil, Hindi, Marathi
C#/.NET Desktop App Developer | WinForms, WPF, SQL Server
I build, fix & modernize Windows desktop apps using C# and .NET. From custom
WinForms/WPF development and SQL Server integration to bug fixes and legacy
framework upgrades, I deliver clean, tested code with full source code included. 13+
years experience, root-cause analysis, NDA available, and fast turnaround. No-fix,
no-fee guarantee. Let's get your app working!
My Portfolio
Other Software Development Services I Offer
FAQ
What .NET versions can you upgrade from?
I can modernize apps built on older .NET Framework versions and upgrade them to a currently supported .NET release.
Will my app's existing features still work after the upgrade?
Yes. I run compatibility testing to ensure your app behaves exactly as before, just cleaner and better supported.
Do you work with both WinForms and WPF?
Yes, I modernize both WinForms and WPF Windows desktop applications.
Will you rewrite my entire app from scratch?
No. I refactor and upgrade incrementally, preserving your working features and minimizing disruption
Can you update outdated or vulnerable dependencies?
Yes. I update NuGet packages and dependencies to remove outdated or insecure libraries.
Do you provide documentation of the changes?
Yes. Every order includes a clear summary of the changes made and upgrade steps performed.
What do you need from me to get started?
A brief description of your app, its current framework version, and your goals. Message me before ordering so I can confirm the scope.
Is post-delivery support included?
Yes, the Premium package includes post-delivery support. For other packages, message me and we can discuss your needs.
