Simplex Method Ltd.

Legacy .NET systems modernized—safely and efficiently.

We upgrade VB.NET, C#, classic ASP, and desktop apps to modern .NET with minimal downtime. Desktop, web, and cross‑platform UI with Avalonia.

Request a system review Our services
  • NDA friendly
  • EU/GDPR compliant
  • 25 years of experience

Deep Microsoft stack expertise

VB.NET, C#, .NET Framework → .NET 8, classic ASP, ASP.NET Core, SQL Server.

Desktop and cross‑platform UI

Modernize WPF/WinForms and build cross‑platform apps with Avalonia UI.

Low‑risk modernization

Pilots, rollbacks, CI/CD, and careful cutovers—keep operations running.

What we do

Legacy modernization and migration

Migrate VB.NET to C#, upgrade .NET Framework apps, refactor monoliths, and improve performance.

Desktop and cross‑platform UI

WPF/WinForms upgrades and Avalonia UI for Windows, Linux, and macOS.

Web development and upgrades

ASP.NET Core services and classic ASP maintenance or migration paths to modern .NET.

Maintenance and support

On‑demand or retainer, incident response, monitoring, and small enhancements.

A simple, reliable process

  1. 1

    Discover

    Short call to understand goals, constraints, and timelines.

  2. 2

    Audit

    Review code, dependencies, deployment, and risks.

  3. 3

    Roadmap

    Clear plan with milestones, pilots, and rollback strategy.

  4. 4

    Pilot

    Validate approach on a safe slice of the system.

  5. 5

    Rollout & support

    Careful deployment, documentation, and ongoing support.