.NET development for new builds and the .NET apps you rely on.
Hoop Interactive builds ASP.NET Core web apps and APIs, and moves ageing .NET Framework systems to modern, cross-platform .NET one piece at a time. Web Forms, WCF and Xamarin included, without a risky big-bang rewrite.
What we build and modernise in .NET.
Custom .NET development for new systems and for the Microsoft applications your business already depends on.
- ASP.NET Core web apps
- Portals and business systems built with Razor Pages, MVC or Blazor.
- .NET API development
- REST and gRPC APIs with Minimal APIs, authentication and OpenAPI docs.
- .NET Framework migration
- Move .NET Framework apps to modern .NET, project by project.
- Web Forms & WCF modernization
- Legacy pages and services rebuilt on supported .NET technology.
Still on .NET Framework? Here's when to move.
.NET Framework 4.8 still runs, but it's in maintenance mode: no new features, Windows-only hosting and a shrinking pool of developers who want to work on it.
- 01
Windows Server costs keep rising
Modern .NET runs in Linux containers, which is usually cheaper to host.
- 02
Web Forms or WCF at the core
Neither exists in modern .NET, so they block every upgrade.
- 03
Xamarin mobile apps
Microsoft ended Xamarin support in May 2024. Store requirements will eventually force a move.
- 04
Hard to hire for
Developers prefer modern .NET, and fewer know older frameworks well.
- 05
Our approach
Tests first, then migrate one project or page at a time with old and new running side by side.
How we build .NET applications today.
Some .NET vendors still sell Xamarin and “.NET 5 readiness”. This is the stack we use now, on current long-term support releases.
React
PostgreSQL
GitHub Actions
DockerWhen .NET is the right choice, and when it isn't.
We build in .NET, Node.js and Python, so our advice isn't tied to one platform.
| Situation | .NET | Alternatives | Our usual advice |
|---|---|---|---|
| Microsoft-centric company | Excellent fit with Azure, Entra ID and SQL Server | Possible, more integration work | .NET |
| Existing C# team | Strong advantage | Retraining needed | Stay on .NET and modernise |
| Enterprise back-office systems | Mature, fast and well-typed | Node.js or Laravel also work | .NET or whichever your team maintains |
| Startup MVP with a JS team | Capable but less common | Next.js and Node.js | Full stack TypeScript |
| AI and data-heavy product | Good for calling AI services | Python ecosystem | Python for the AI layer |
Rescuing legacy systems without stopping the business.
BeesApp's system had been stitched together by earlier vendors and kept failing. The same audit-first, step-by-step approach drives every .NET migration we take on.
LEGACY RESCUE · PLATFORM REBUILD
99.9% uptime after replacing a fragile legacy platform
We audited it, planned the move and rebuilt it on a modern stack while the business kept trading.
Read the case studyHow we differ from a typical .NET development company.
Beyond the Microsoft logos, here's what changes for you.
| What matters | Typical .NET vendor | Hoop Interactive |
|---|---|---|
| Versions | Pages still selling Xamarin and .NET 5. | Current long-term support releases. |
| Migration | Full rewrite, months of frozen features. | Incremental, old and new running side by side. |
| Hosting | More Windows servers. | Linux containers on Azure or AWS where it saves money. |
| Advice | .NET for everything. | .NET when it fits; Node.js or Python when they fit better. |
| Front end & mobile | Back end only. | Web front ends and Flutter or MAUI apps from the same team. |
| Handover | Code with no documentation. | Tests and documentation your team can keep. |
How a .NET project runs with us.
Safety nets before speed, whether it's a new build or a migration.
Discovery or audit
Requirements for new builds, or a dependency and portability audit for existing apps.
1–2 weeks · Written plan & fixed quoteSafety nets
Source control, CI, staging and tests around the flows that matter most.
Weeks 2–3 · Tested baselineBuild or migrate
Features in sprints, or migration project by project behind a reverse proxy.
Ongoing · Weekly demosPerformance & security
Profiling, query tuning, dependency checks and security review.
Before launch · Performance reportRelease & cloud move
Containerised deployment with rollback, then retire the old servers.
Launch · Live release and runbookSupport
Monthly patches and updates, or handover to your team with documentation.
Ongoing · Maintenance planWhat .NET development costs with Hoop.
Clear starting prices, with tests and code review always included. Prices are in USD and exclude Azure, AWS and Microsoft licensing costs, which are billed to your own accounts.
- Investment
- from $2,500
- Timeline
- 1–2 weeks
- Scope
- Framework & dependency review
- Included
- Portability, security, performance checks
- Deliverable
- Migration roadmap with estimates
- Investment
- from $12,000
- Timeline
- 6–16 weeks
- Scope
- New build or incremental migration
- Included
- Tests, CI, container deployment
- Deliverable
- Docs, handover, 30 days of fixes
- Investment
- from $3,500/mo
- Commitment
- Full-time, month to month
- Scope
- Mid or senior C# developer
- Included
- Works in your tools, engineering lead backup
- Start
- About two weeks
.NET help for every stage.
The situations we're asked to help with most often.
Companies on .NET Framework
Planned, incremental migration to modern .NET.
Microsoft 365 organisations
Internal apps with Entra ID sign-in and Azure hosting.
Teams with Xamarin apps
Move to .NET MAUI or Flutter before store rules force it.
Insurance & finance
Long-lived back-office systems that need modernising safely.
Teams that lost their developer
Takeover, documentation and ongoing support.
Windows desktop software
WinForms and WPF apps upgraded or moved cross-platform.
Explore more Software Development services.
.NET development pairs naturally with these services from Hoop Interactive.
Web Applications
The broader practice this service sits under.
ExploreAPI Development
REST and gRPC APIs behind your .NET apps.
ExploreCloud Migration
Moving containerised .NET to Azure or AWS.
ExploreEnterprise Software
Long-lived back-office systems built on .NET.
ExploreDesktop Apps
WinForms and WPF modernization and cross-platform desktop.
ExploreLaravel & PHP
An alternative back-end stack we also build in.
ExploreSoftware Maintenance
Ongoing updates and support after launch.
ExploreHire Developers
Add a dedicated .NET developer to your team.
Explore.NET development questions
About our .NET development services. Ask us anything else.
A .NET code audit starts from $2,500. A .NET project such as a new ASP.NET Core app, API or framework migration starts from $12,000, and a dedicated full-time .NET developer from $3,500 per month. You get a fixed quote after a free discovery call.
.NET Framework 4.8 still runs, but it gets no new features, only runs on Windows and limits hosting and hiring options. Modern .NET is cross-platform, faster and actively developed. If your app is still changing, migrating usually pays off.
We audit dependencies, add tests around critical flows, then migrate project by project, often running old and new parts side by side behind a proxy so users never see a big-bang switch.
Neither is supported on modern .NET. Web Forms pages are rebuilt in Razor Pages, MVC or Blazor, and WCF services move to REST APIs or gRPC, keeping the business logic you already have wherever possible.
Yes. Modern .NET runs in Linux containers, so we can deploy to Azure App Service, Azure Container Apps, AWS or your own servers, often reducing hosting costs compared with Windows-only servers.
No. Microsoft ended Xamarin support in May 2024. Xamarin apps should move to .NET MAUI, or to Flutter or React Native if a broader mobile ecosystem suits you better. We help you choose and migrate.
.NET is a strong fit for enterprise systems, Microsoft-centric companies and teams that know C#. Node.js suits JavaScript-first teams and real-time apps, and Python suits AI and data-heavy products. We recommend based on your team and systems, not on what we prefer.
Yes. You can add full-time .NET developers to your team month to month from $3,500 per developer, with code review and backup from our engineering lead.
You do. Code lives in your repositories and cloud accounts are in your name.