Delphi to C# Migration
Delphi systems rarely fail due to bugs, but because of business logic locked inside UI events, binaries, and undocumented flows.
Corsac can convert Delphi to C# architectures, preserving proven logic while eliminating platform risk, vendor dependency, and stalled releases. We modernize with parallel delivery, full control, traceability, and stability.
AWS Certified Cloud Practitioner
PCI DSS Compliance
HIPAA Compliant
Azure Solution Architect Expert
SOC 2 Type II Certification
GDPR certification
Azure Administrator Associate
Azure Developer Associate
Azure Fundamentals
Every Windows update or hardware refresh disrupts your Delphi apps
Your key engineers face burnout from constant fixing of Delphi issues
Desktop-first Delphi architectures restrict APIs, cloud, integrations, and AI adoption
GDPR, HIPAA, SOC2, or ISO compliance suffers from poor encryption, logging, and audit patterns
Tech debt and operational overhead drain resources intended for growth
Our modernization experience spans over 18 years in 7+ industries, including GIS, Construction, Healthcare, and more. We convert Delphi to C#, delivering controlled modernization of desktop-heavy, UI-bound legacy systems into maintainable .NET architectures.
Reduced hotfix release time by
70%Achieved backlog visibility of
100%
Reduced code duplication and raised development efficiency by
75%Lower average time gap in cross-platform feature delivery by
80%
Reduced device setup time
60%Reduced memory use
38%We reveal dark tech debt by spotting the areas that accumulate hidden costs in your Delphi system: UI coupling, undocumented rules, and brittle binaries.
Reduce operational risk stemming from OS changes, tooling limits, and vendor lock-in
Restore smooth release cycles by eliminating the fear of upgrades
Extend the potential talent base and avoid hiring risks by moving to widespread C#/.NET
Prepare for web, cloud, and AI initiatives without another rewrite
Reinforce compliance with auditable and testable architectures
Safeguard existing investment by migrating proven logic instead of refusing it
Transfer core business rules from Delphi UI code into reusable C# services
Move from form-based logic to a clean, layered system arrangement
Replace VCL/FMX interfaces with WinForms, WPF, or MAUI based on strategic needs
Standardize database access, transactions, and data contracts
Enable asynchronous processing, APIs, and CI/CD without safety risks
Introduce automated testing previously limited by legacy Delphi architectures
Let us help you rebuild what’s holding you back.
We perform incremental migration where Delphi and C# systems run in parallel, without disruptive cutovers.
Our engineers minimize interference with your team, integrating into your Git, CI/CD, security policies, and release cadence.
We aren’t a full-stack agency. We’ve built our team, processes, and tech strategy specifically to tackle legacy issues and help mid-market players scale and innovate.
We integrate with your workflows, minimizing interference with your developers. While utilizing your Git, CI/CD, and tools, we operate independently, letting your team focus on their work.
Your aging system drains your business resources through slow hiring, security gaps, and delayed launches. We reduce these “dark tech debt” losses before they impact your revenue.
We remove legacy barriers preparing your systems for advanced tech. You can embrace new tools with the future-ready and ROI-driven architecture.
Modernization efforts will be ineffective if the core issue is institutional rigidity. We reveal hidden limits and help grow with flexibility.
We treat your system efficiently: evolve the functioning parts and replace only the ones that require change.
To convert Delphi to C Sharp efficiently, we assess source code, VCL/FMX dependencies, data access, and hidden logic to shape a structured strategy. The resulting roadmap clearly indicates what must be preserved and what should be redesigned for a safe C# conversion.
We separate core application logic from Delphi UI code and rebuild it as independent C# services and shared libraries. The goal is to eliminate hidden dependencies, global state, and brittle execution chains, while retaining system functionality and reliability.
Rearrange legacy VCL/FMX interfaces with WinForms, WPF, or MAUI, according to product lifespan, deployment model, and future strategy
Fully separate interfaces from business logic, allowing UI and UX upgrades without altering core functionality
Decouple database operations from forms, leveraging reusable data access layers
Make core functionality available through REST APIs to support ERP, BI, and third-party integrations
Introduce asynchronous processing and modern authentication for reliability, safety, and scalability
We establish regression coverage previously impossible in Delphi, check real-world behavior, and launch in phases. We convert Delphi to C# only when performance and stability are proven, ensuring the full knowledge transfer. The new C# system is arranged for strength and maintainability.
Book an expert consultation to uncover gaps in your system. Let us modernize your business to its maximum potential.
We focus on modernization for companies unable to grow due to aging systems
We replace only what must be changed, protecting your investment and CTO’s credibility.
HIPAA, HL7/FHIR, SOC2, GDPR, ISO compliance is integrated into every stage.
Integrating into your Git, CI/CD, and workflow tools, we make modernization visible, testable, and traceable
We uncover hidden costs, feature delays, and security gaps and offer ways of their removal
By providing CEOs stakeholder-ready roadmaps and progress metrics, we enable well-grounded transformation
They fulfill your task without seeking to address the issue at the root
Dispersing the focus, they fail to meet specific Healthcare G and other industry requirements
Generalized practices, regardless of the product, team, or business specifics
Initiate full rewrites instead of using the working parts and considering business context
Insufficient collaboration leads to poor handover, with documentation debt and weak enablement.
Development happens in isolation, prioritizing code delivery over actual business value.
By converting Delphi to C# and the modern .NET platform with a reliable modernization partner, you reduce operational risk stemming from OS changes, tooling limits, and vendor lock-in. Smooth release cycles are restored by eliminating the fear of upgrades. The potential talent base is extended, and the hiring risk is reduced thanks to widespread C#/.NET. Delphi to net migration prepares your system for web, cloud, and AI initiatives without another rewrite.
Before you start converting from Delphi to C#, you should conduct a pre-migration assessment. This includes the analysis of your existing Delphi application to identify weak areas, modernization priorities, and project scope. Clearly set your goal to determine the target architecture. Establish a strong testing strategy to ensure the app behaves as expected, and choose the right migration partner for a predictable journey.
To convert Delphi code to C# safely, you should apply a structured approach. Consider the differences in language and syntax, which may require manual regulation. Check component and library compatibility, especially with Delphi’s VCL and third-party libraries. Refactoring may be needed when moving monolithic Delphi architectures to modular C#. Don’t forget about proper database migration and thorough testing.
It is worth considering the Delphi to C# migration for the following primary reasons. The pool of C# developers is much larger, which eases the recruiting process. C# and .NET provide superior integration opportunities with cloud services, breakthrough analytics, and modern development approaches. C# is suitable for modular design, enhancing maintainability and scalability. Finally, C# apps often have advanced security measures.
When a Delphi to C# migration is performed manually, it guarantees complete control, with the opportunity to completely redesign the architecture and eliminate legacy issues. Automated conversion, on the other hand, significantly accelerates the process and reduces expenses. A professional modernization partner can competently combine both by automating only mechanical tasks, such as code scanning, dependency mapping, and data models.
