Backend & data
.NET
Microsoft's robust framework for enterprise-grade backends and systems.
.NET is Microsoft's mature, open-source framework for building robust backends, APIs and business applications. Built on the fast, strongly typed C# language, it's a mainstay of enterprise software. HDC works in .NET when a client needs a serious, well-structured backend, line-of-business systems, secure APIs and integrations, or already runs on the Microsoft stack and needs it built on and maintained properly.
Where it shines
- Strongly typed C# catches errors at compile time, making large systems reliable
- Enterprise-grade performance and stability, backed long-term by Microsoft
- Excellent for secure APIs, line-of-business apps and integration-heavy systems
- Cross-platform and open-source since .NET Core, runs on Windows, Linux and cloud
- First-class tooling and a natural fit with Azure and the wider Microsoft stack
- Mature libraries for authentication, data access and background processing
Trade-offs to weigh
- Heavier and more involved than is warranted for a simple marketing site
- Stronger ties to the Microsoft ecosystem than fully open stacks
- Hosting can cost more than the cheap static or PHP options for small sites
- Overkill when a lightweight Node or serverless function would do the job
What .NET is
.NET is Microsoft’s framework for building software, backends, APIs, desktop apps and business systems. It’s built around C#, a strongly typed, modern language that catches whole classes of mistakes before code ever runs, which is a big reason .NET is trusted for serious, long-lived systems. First released in 2002 and reborn as the open-source, cross-platform .NET Core (now simply .NET), it has decades of maturity behind it and Microsoft’s long-term backing in front of it.
Where a static-site stack is built for speed and content, .NET is built for robustness. It’s the kind of framework organisations choose when a system needs to stay reliable and secure as it grows, handle complex business rules, and be maintained for years. It runs everywhere now, Windows, Linux and the cloud, though it remains a natural fit with Azure and SQL Server.
How HDC uses .NET
.NET is our tool for the serious backend work some clients need. In practice that means:
- We build secure APIs and backends for projects with real application logic, portals, internal tools, systems with rules that have to be enforced consistently.
- We build line-of-business systems that replace fragile spreadsheets and manual processes with something structured, reliable and shared across a team.
- We handle integrations where data has to move safely between systems and correctness matters.
- We build on and maintain existing Microsoft-stack systems for clients already running .NET, SQL Server and Azure, rather than pushing an unnecessary rebuild.
We typically pair a .NET backend with a fast modern front end and ship it through Azure DevOps.
Why we apply it
Not every client just needs a website. Some have outgrown the spreadsheets and manual workarounds that got them this far and need a proper system underneath the business, one that won’t fall over as more people and more data pile onto it. That’s exactly where .NET earns its keep. Its strong typing and mature structure mean a system stays reliable and maintainable long after launch, which protects the client’s investment.
It also lets us serve businesses already in the Microsoft world honestly. If a client runs on .NET, SQL Server and Azure, the right move is usually to build on that foundation, not replace it, and because we genuinely work in .NET, we can.
How .NET fits our stack
.NET is the heavyweight backend in our toolkit, used when robustness outranks simplicity. It pairs naturally with SQL Server for data and ships through Azure DevOps and the Azure cloud, the Microsoft tooling it’s designed around. On the front end we put a fast, modern layer, React or Astro, over the top, so the visitor gets a quick, SEO-friendly experience while .NET handles the data, security and business rules behind it. Its typed, structured discipline sits comfortably alongside the TypeScript we use elsewhere. The result is a clean split: a serious backend where it’s needed, a fast front end where it counts.
When .NET isn’t the right tool
We’re honest about fit. For a standard marketing or brochure site, .NET is the wrong weight class, we’d build on Astro for speed and SEO, with no heavy backend at all. For a small piece of custom logic or a simple integration, a lightweight Node function is usually quicker and cheaper to run. .NET comes into its own when there’s a genuine application behind the project: a system that must be secure, reliable and maintainable for years, or a client already invested in the Microsoft stack. We bring it out for those jobs, not as a default.
Worked example
A reliable backend for a business that's outgrown spreadsheets
Imagine a growing firm running quotes, jobs and invoices across a tangle of spreadsheets that only one person fully understands. We build a .NET backend with a SQL Server database behind it: a secure API that holds the data in one place, enforces the business rules, and exposes it to a clean web front end the whole team can use. Because C# is strongly typed and the system is properly structured, it stays reliable as the business grows and as more people depend on it, the opposite of a fragile spreadsheet held together by hope. (Illustrative, every build is scoped to your goals.)
Better together
How .NET fits with the rest of our stack
Azure DevOps
Where we build, test and ship .NET projects
Learn moreSQL Server
Microsoft database that pairs naturally with .NET
Learn moreTypeScript
Shares .NET's typed, structured discipline on the front end
Learn moreAzure
Microsoft cloud .NET deploys to cleanly
Learn moreReact
Front end we often pair with a .NET API
Learn more.NET: your questions answered
What kind of projects is .NET good for?
.NET shines on serious backends: secure APIs, line-of-business applications, systems with complex rules, and anything that needs to stay reliable as it grows. It's the kind of framework you choose when robustness and long-term maintainability matter more than shipping a small site quickly.
Is .NET only for Windows?
Not any more. Since .NET Core, it's fully cross-platform and open-source, it runs on Windows, Linux and macOS and deploys cleanly to cloud platforms. It still pairs especially well with Microsoft tools like Azure and SQL Server, but it's no longer locked to Windows.
Do I need .NET for my website?
Most marketing and brochure sites don't, we'd build those on a lighter stack like Astro. You reach for .NET when there's a real application behind the site: a customer portal, an internal system, or an integration-heavy backend where its structure and reliability pay off.
Why does HDC use .NET?
Because some projects need an enterprise-grade backend, and .NET is one of the best tools for that. We use it for secure APIs, line-of-business systems and integrations where reliability and maintainability are non-negotiable, and for clients already on the Microsoft stack who need it built on properly.
Can .NET work with a modern website front end?
Yes. A common pattern is a .NET API on the backend with a fast, modern front end, built in Astro or React, talking to it. The .NET layer handles the data, security and business logic while the front end stays quick and SEO-friendly. We get the strengths of both.
We already run on Microsoft systems, can you work with that?
Absolutely. If your business already lives in the Microsoft world, .NET, SQL Server, Azure, we can build on and maintain that rather than push you to switch. Working with your existing stack is usually faster, cheaper and less disruptive than replacing it.
Want .NET working for your business?
Tell us what you're trying to achieve, we'll show you, honestly, whether it's the right tool and how we'd apply it.
Enquire now