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.NET & Legacy Modernization

From .NET Framework to .NET 10, without stopping the business.

We migrate .NET Framework 4.x, Web API 5.2, MVC5 and WebForms applications to modern .NET 10 and ASP.NET Core in phases, so the solution builds and runs at every step.

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What's included

  • .NET Framework 4.x → .NET 10 / ASP.NET Core
  • Web API 5.2 and MVC5 → ASP.NET Core with JWT and global error handling
  • WebForms admin portals rebuilt as ASP.NET Core MVC or Angular
  • EF6 EDMX → EF Core, System.Web and Telerik removal
  • Database migrations such as MySQL → SQL Server or SQL Server → PostgreSQL
  • Automated build and deployment pipelines

Modernize without a risky big-bang rewrite

Rewriting a working system from scratch is the most expensive way to modernize it. We migrate in phases: isolate legacy code, convert project by project, and keep the solution compiling and the business logic intact at every step.

How we do it

  1. Assessment. We map projects, dependencies and blockers (System.Web, EDMX, WebForms, abandoned packages) and give you a written plan.
  2. Foundation. Move to SDK-style projects and modern .NET. Replace dependencies that don't run on it.
  3. Convert in batches. APIs first, then admin portals and background jobs, each batch tested before the next.
  4. Deploy. Scripted builds and deployments to IIS, Linux, containers or the cloud.

Proof

We migrated a file-sharing SaaS from .NET Framework 4.6.2 to .NET 10: a 7-project solution of about 800 C# files, 19 API controllers moved to ASP.NET Core and a 52-page WebForms admin portal rebuilt as ASP.NET Core MVC.

Related work

Where we've done this before

Advertising technology
13Ad products forecast
Ad-tech platform (confidential)

An AI forecasting pipeline that never makes up a number

A hybrid forecasting system producing 30-day impression, CPM, reach and strategy-split forecasts for 13 ad products. Deterministic engines compute every figure; a self-hosted LLM handles classification and narrative.

  • .NET 10
  • C#
  • Python
  • PostgreSQL
Read case study
Business software & accounting
192/194Records linked automatically
Business software company (confidential)

Replacing a QuickBooks Desktop connector with unattended two-way sync

A two-way sync between a SQL Server business system and QuickBooks Online, replacing a legacy Desktop / Web Connector integration. It runs unattended with automatic OAuth token refresh.

  • C#
  • .NET 10
  • ASP.NET Core
  • SQL Server
Read case study
SaaS · Large file transfer
~800C# files migrated to .NET 10
Attachmore

Attachmore: modernizing a file-sharing SaaS end to end

A .NET Framework 4.6.2 → .NET 10 migration of about 800 files, a 52-page admin portal rebuilt in ASP.NET Core MVC, a new Angular 22 SSR frontend and PayPal subscriptions with a marketplace flow.

  • .NET 10
  • ASP.NET Core
  • EF Core
  • SQL Server
Read case study

Other services

Custom Trucking Software DevelopmentLogistics Workflow AutomationTMS & Accounting Software IntegrationsAI Automation for Logistics CompaniesFreight Broker Software SolutionsLogistics Web Applications & Customer PortalsAI & LLM IntegrationWeb & SaaS DevelopmentPayments & Accounting IntegrationsMVP Development & LaunchUI/UX DesignDevOps & CloudAI Code Review & RescueBusiness Process Automation

Let’s Solve Your Trucking & Logistics Software Challenges

Tell us about your operation, the systems you use, and the challenges you want to solve. Softlaunchers can help you evaluate a practical approach to software development, workflow automation, and integrations for your logistics business.

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