What This Is
C# is Microsoft’s primary application language, powering enterprise systems built on .NET, Windows services, and internal business tools across thousands of organisations. We work with C# in client projects where existing infrastructure runs on the .NET ecosystem — ASP.NET APIs, Windows desktop applications, Azure-hosted services, and SQL Server-backed business systems.
Our C# engagements centre on integration, maintenance, and modernisation rather than building new .NET applications from scratch. Many UK businesses have critical internal systems built on C# — often ASP.NET MVC or Web API applications written five to ten years ago that still handle core operations. These systems work, but they need security updates, performance improvements, new integrations with modern web services, and sometimes a migration path to something more maintainable long-term.
C# is a well-designed language with strong typing, excellent tooling in Visual Studio, and a mature ecosystem. Where it runs as the backbone of a client’s operations, we work within it rather than proposing unnecessary rewrites. Where it creates friction — typically in hosting costs, deployment complexity, or limited developer availability compared to open-source stacks — we help plan and execute a transition at a pace that makes business sense.
When You Need This
C# development is relevant when your project involves existing .NET infrastructure or Microsoft-ecosystem integration. Common scenarios:
- Your business runs ASP.NET applications that need security patches, dependency upgrades, or new features
- You need a modern frontend or API layer connecting to an existing .NET backend
- SQL Server databases power your operations, and you need schema work, query optimisation, or reporting that requires C# integration knowledge
- You are considering migrating from .NET to an open-source stack and need developers who understand both sides
- A vendor or partner system uses .NET/C# SDKs, and you need integration work that speaks the same language
- Your team uses Azure and needs application code that works natively with Azure services
How We Work
C# projects follow .NET conventions and tooling. We use Visual Studio or Rider, NuGet for package management, and follow standard solution/project structure. ASP.NET Core projects use the built-in dependency injection, middleware pipeline, and configuration patterns. Entity Framework or Dapper handles database access depending on complexity and performance requirements.
Integration projects bridge the .NET world with our core stack. A common pattern is a React frontend consuming a legacy ASP.NET API, or a Laravel application that needs to exchange data with a .NET-based ERP. We define clean API contracts between systems, implement proper authentication (often OAuth2 or API key exchange), and ensure error handling and monitoring work across the boundary.
Migration projects are phased, not big-bang. We extract functionality incrementally — perhaps moving the public-facing API to Laravel while the internal admin system stays on .NET, or rebuilding the frontend in React while the C# backend continues serving data. Each phase delivers a working system, and the migration can pause at any point without leaving the business in a broken state.
What You Get
- ASP.NET Core development — APIs, web applications, and background services on modern .NET
- Legacy .NET maintenance — framework upgrades, security patches, and targeted improvements on existing systems
- System integration — connecting .NET applications to modern web services, APIs, and frontends
- SQL Server work — schema design, query optimisation, and Entity Framework tuning for .NET applications
- Migration planning — phased transition from .NET to open-source stacks with zero downtime
- Azure integration — working with Azure services (App Service, Functions, Storage) where they are already in use
Technologies We Use
- C# 11 / .NET 7+ — current language features with modern runtime
- ASP.NET Core — web framework for APIs and server-side applications
- Entity Framework Core — ORM for SQL Server and other relational databases
- NuGet — package management for .NET libraries
- SQL Server — Microsoft’s relational database, frequently paired with C# applications
- Azure — cloud platform integration where clients already use Microsoft infrastructure
Related Systems
C# backends often serve data to React frontends. SQL Server is the default database in .NET environments. For enterprise Java systems with similar integration needs, see our Java page. Migration targets typically involve Laravel and PostgreSQL.
Talk to Us About C# Development
If you have .NET systems that need maintenance, integration with modern services, or a migration path to open-source alternatives, get in touch and we will assess the situation practically.
