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Technology never stops evolving, modernizing your software is key to staying ahead. Microsoft now recommends the open-source, cross-platform .NET (Core) platform over the old Windows-only .NET Framework. Migrating to the latest .NET unlocks new business opportunities – from AI and cloud integration to improved security and speed – so you can focus on growth. TwinCore ensures a smooth transition to .NET, giving your business the edge it needs while you concentrate on your core goals.
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Why Choose TwinCore for .NET Migration
Since 2011, we have completed over 75 .NET migrations, rewriting thousands of classes and transforming legacy software into modern, high-performance applications. Our team of Microsoft-certified engineers knows every corner of the .NET ecosystem – web, desktop, and cloud. We have a proven track record of delivering on time and on budget.
End the endless bug-fixing
Stop spending thousands on patches and workarounds.
Solve performance bottlenecks
Make your app fast again - even on older hardware.
Free your team
Let developers add new features instead of firefighting legacy code.
Leverage AI & cloud
Modern .NET is the gateway to AI tools, microservices, and serverless tech.
Avoid tech debt
Retiring old software in time prevents security vulnerabilities and compliance issues.
We’ll provide a customized migration plan and guide you through every step. Contact us for a free consultation to see how we can modernize your applications and let you focus on what truly drives your business.
What’s Included in Our .NET Migration Services
Code Audit and Assessment
We analyze your legacy code to identify risks and modernization paths.
Quality and Security Metrics
Continuous static analysis and code reviews mean fewer bugs and more maintainable code (we often see defect rates drop by 50% after refactoring).
Performance Testing
We establish current benchmarks (page load times, API response, throughput) and prove gains after migration.
Clear and Transparent Process
You get regular status updates, performance reports, and a detailed migration roadmap.
Post-Migration Support
We stay on hand to ensure a stable launch, train your team, and help optimize your new environment.
.NET Migration Services We Offer
Legacy Application to .NET Migrations
Convert old systems (VB6, Delphi, Classic ASP, etc.) to modern .NET Core or .NET 6/7+.
Framework Upgrades
Move any .NET Framework application (1.1–4.x) to the latest .NET (6/7/8), updating libraries and APIs.
Architecture Modernization
Break monoliths into microservices and apply modern patterns (CQRS, Clean Architecture).
Cloud Migration & Optimization
Deploy and optimize your .NET apps on AWS or Azure (Elastic Beanstalk, App Services, Lambda/Functions, etc.) for scalability.
Containerization & DevOps
Dockerize your .NET applications and set up CI/CD pipelines for fast, reliable deployments.
Legacy to .NET Migration
VB6 / Delphi to .NET Core
Upgrade VB6 or Delphi apps to C#/.NET. Migrating these legacy systems yields higher performance and efficiency, expanded functionality, and improved security.
Classic ASP to ASP.NET Core
Rewrite old ASP scripts into a modern ASP.NET MVC or Web API project for maintainability.
ASP.NET WebForms to ASP.NET Core (MVC / Blazor)
Transform WebForms apps into a current framework (we often recommend Blazor or Razor Pages) so you can use modern UI libraries and client-side features.
ASP.NET MVC to ASP.NET Core
Update MVC5/4 apps to .NET Core MVC/Web API for better performance and cross-platform hosting.
WinForms / WPF to Blazor / .NET MAUI
Convert desktop UIs into web or cross-platform apps. For example, turning a WinForms inventory tool into a Blazor WebAssembly app lets you reach mobile devices and web browsers.
PHP / Ruby / Java to .NET Platform
Consolidate your tech stack by rewriting non-Microsoft applications in .NET, leveraging its productivity and integration.
.NET Framework to .NET Core Upgrade
Platform Update
Upgrade .NET Framework (1.1–4.8) apps to the latest .NET (Core/6+). This gives you long-term support and cross-platform capability.
Dependency Refresh
Upgrade all NuGet packages, third-party libraries, and API calls to modern versions. We ensure every component is compatible with the new runtime.
Refactor Legacy Code
Remove deprecated APIs and optimize the codebase. We introduce best practices (async/await, dependency injection, minimal APIs where appropriate) to improve maintainability.
Integrate Code Metrics
We add static analysis (SonarQube, etc.) and additional test coverage to catch issues early. You’ll have visibility into code quality throughout.
Enhanced Security
By moving off old frameworks (Microsoft has retired .NET 4.5.2/4.6.x), you eliminate years of known vulnerabilities. We implement modern security features (e.g. Identity, data protection, JWT authentication, HTTPS enforcement).
Architecture Modernization
Monolith to Microservices
We break down a big application into smaller services. Each service handles a specific domain and can be deployed independently. This reduces coupling and improves scalability. Research shows that re-platforming monolithic .NET apps into microservices creates a “nimble, cost effective and high-performance architecture”.
Modern Design Patterns
We apply CQRS (Command-Query Responsibility Segregation) and Clean Architecture or Domain-Driven Design where appropriate, making your system modular and easier to evolve.
Containerization & DevOps
Each microservice can run in Docker or Kubernetes. We set up automated build and deployment pipelines so you can release updates quickly and reliably. This also simplifies horizontal scaling – add instances of bottlenecked services with a button.
Performance & Scalability
With microservices, you scale only the parts that need it. One of our clients literally doubled their user capacity with the same hardware after our migration. No more one-size-fits-all scaling or single points of failure.
.NET Frameworks We Migrate
Our expertise covers all legacy .NET platforms. Whether your application is on .NET 1.1, 3.5, or 4.8, built with Web Forms, classic Web API, or old Windows app technologies – we can modernize it. Examples include:
.NET Framework 1.1 – 4.x
We’ve migrated projects from early .NET versions up through 4.8.
ASP.NET Web Forms & MVC
Classic WebForms pages or older MVC projects get converted to ASP.NET Core MVC or Razor/Blazor, with modern front-ends and clean separation of concerns.
WinForms & WPF
Even desktop applications can be modernized, either by moving them to .NET Core (if staying desktop) or by reimplementing as web apps (Blazor).
Silverlight
Though obsolete, legacy Silverlight applications can be re-imagined as web apps (e.g., Blazor) or desktop apps with WPF/.NET Core.
Web API & WCF
We migrate old Web API or WCF services to modern RESTful ASP.NET Core Web APIs or gRPC services.
Migrate .NET Apps to the Cloud
After modernizing your code, we help you take full advantage of the cloud. Cloud-enabled .NET applications are more scalable, resilient, and cost-efficient:
AWS Migration
We can deploy your .NET Core apps on AWS Elastic Beanstalk or Amazon ECS/EKS (Docker), or even refactor services to run serverless on AWS Lambda with .NET support. AWS provides easy auto-scaling and global reach.
Azure Migration
As a Microsoft-centric tech, .NET runs great on Azure. We’ll lift your app to Azure App Service or Azure Kubernetes Service, and incorporate Azure Functions for event-driven tasks. Azure’s built-in services (Cosmos DB, Azure Storage, etc.) integrate seamlessly.
Cost Optimization
Cloud gives pay-as-you-go flexibility. We architect solutions to minimize wasted spend – for example, using auto-scaling rules and reserved instances. In fact, cloud migration reduces IT costs and improves performance by only running what you need. You’ll stop paying for idle hardware and gain the ability to handle traffic spikes instantly.
Global Performance
With Azure/AWS data centers worldwide, we can deploy your app closer to your users to minimize latency.
DevOps & Monitoring
We set up cloud-native monitoring and logging so you can track performance and health in real-time (Azure Monitor, AWS CloudWatch).
By moving to the cloud, your application gains automatic failover, easier disaster recovery (snapshot backups, multiple zones), and the agility to innovate. We make sure the migration is smooth – whether it’s a full lift-and-shift or a phased refactor.
Containerization of .NET Applications
Containerizing your .NET applications is the fastest path to consistent deployments and microservices. We will:
Dockerize Applications
Build Docker images for your .NET Core or .NET 6/7 applications. Containers bundle the app with its runtime and dependencies, so it runs the same anywhere.
Kubernetes or Docker Swarm
Deploy and manage those containers with orchestration platforms. We configure services, networking, and auto-healing (restart crashed containers) for you.
CI/CD Pipelines
Integrate with tools like GitHub Actions, Azure Pipelines, or Jenkins so every code commit automatically builds and deploys a new container image to your environment.
Migrate to Microservices
Containers naturally fit a microservices approach – you can update one service/container without touching others.
Built for Future Growth
With containers, you’re ready to adopt cutting-edge tech like service meshes or serverless containers.
Containerization standardizes your deployment and greatly reduces “it works on my machine” issues. Your development and operations teams will thank you for the streamlined workflow.
Why Upgrade to .NET Now
Modernizing to .NET isn’t just a technical upgrade – it delivers real business value:
Cross-Platform & Future-Proof
.NET (Core) runs on Windows, Linux, and macOS. You’re no longer locked into Windows servers. This means you can deploy where it makes sense – on-prem, AWS, Azure, or even run private cloud or edge instances.
Security & Support
Legacy .NET Framework versions no longer receive updates, exposing you to critical vulnerabilities. Moving to current .NET gives you active patching and advanced security features (data protection APIs, XSS protection, etc.) out of the box.
Performance Boost
Every new .NET release gets faster. For example, benchmarks show .NET 8 can handle ~24% more requests per second than .NET 7. Overall, migrating from .NET Framework to .NET Core/6+ often yields 25–30% performance gains. Your apps will be quicker under load and more responsive for users.
Modern Features
Get access to Blazor for rich web UIs, gRPC for efficient microservices communication, built-in ML/AI libraries, and more. Microsoft’s support for AI in .NET (ML.NET, TensorFlow.NET) means you can integrate intelligence without a complete rewrite. Old tech simply can’t keep up with these innovations.
Developer Productivity
Enjoy development improvements like Hot Reload, better debugging tools, and a unified SDK. Teams work faster because the framework is simpler and community-driven. We handle the migration so your developers can focus on new features, not wrestling with legacy APIs.
Lower Total Cost
Reduced maintenance needs and efficient hosting usually mean big savings. According to Microsoft, cloud migration reduces IT costs and improves performance. Combined with less time spent on manual updates, the ROI on a .NET migration is substantial.
If your application is hard to scale, difficult to update, or holding back new initiatives, the time to migrate is now. TwinCore will ensure you reap these benefits quickly and safely.
TwinCore – Your Trusted .NET Migration Partner
Choosing TwinCore means partnering with a Microsoft-focused software company that has a decade of .NET experience. We combine deep technical skills with a client-first mentality. Our process is consultative: we listen to your needs, draft a strategic plan, and execute carefully to minimize risk.
Ready to Modernize Your .NET Applications? Contact TwinCore today to schedule a free consultation. Let our experts create your customized migration roadmap. Together, we’ll transform your legacy software into a secure, scalable, and agile solution that powers your business forward.
Frequently Asked Questions
What are the benefits of migrating to .NET from legacy platforms?
Migrating to .NET modernizes your application architecture, improves performance and security, and enables integration with modern tools and cloud services. It also reduces maintenance costs and allows your business to scale more easily while staying compatible with current industry standards.
How do you ensure minimal downtime during .NET migration?
We use a phased migration approach and set up staging environments to test thoroughly before going live. This ensures your production systems remain operational throughout the process, allowing for a smooth transition without disrupting business operations.
Do you offer VB6 to .NET migration services?
Yes, we specialize in migrating legacy VB6 applications to modern .NET platforms. This includes redesigning outdated components, improving UI/UX, and optimizing backend architecture for better performance, maintainability, and future scalability.
Can you help with .NET migration and cloud adoption?
Absolutely. We often combine .NET migration with cloud transformation to maximize the benefits. Our team can move your app to platforms like Azure or AWS, ensuring improved availability, flexibility, and reduced infrastructure costs.
How secure is the migration process?
Security is a top priority. We follow best practices such as data encryption, secure coding, and access control. Our team conducts vulnerability scans and implements secure deployment pipelines to protect your application during and after the migration.
Do you provide post-migration support?
Yes. We offer full post-migration support, including bug fixes, performance monitoring, feature enhancements, and infrastructure optimization. Our goal is to ensure your new .NET application continues to run smoothly long after deployment.
