Dotnet Application Development
Enterprise applications on modern .NET, and a safe path off the old one.
We build and modernise .NET applications: enterprise web apps and APIs on modern .NET, integration with SQL Server and Microsoft services, Windows and desktop tools, and migration from legacy .NET Framework systems.
- Modern .NET
- SQL Server
- Legacy migration
Free 30-minute call with a senior specialist. Reply within one business day. Based in Jaipur, working with businesses across India.
- Discovery callFree 30 minutes with a senior specialist
- Scoped first phaseWritten scope, timeline and fixed price
- Build with weekly demosWorking software you can see every week
- Launch and supportGo-live with your team ready, then ongoing support
What is .NET application development?
Dotnet application development builds enterprise web applications, APIs and desktop software on Microsoft's .NET platform, commonly with SQL Server and Azure. Stack18 builds new applications on modern .NET and migrates legacy .NET Framework systems step by step so business operations continue during the change.
Last reviewed 30 October 2026 by the Stack18 delivery team in Jaipur. Security and AI governance · Pricing · About Stack18
| What it covers | New applications; Legacy migration; Data and SQL Server; Desktop and hybrid; Quality and security. |
|---|---|
| Typical first step | Discovery Sprint: 2 weeks, fixed price. |
| Build route | Fixed-scope first release: agreed in discovery; fixed price after discovery. |
| Long-term option | Transformation Pod: 12–36 months, annual contract. |
| Measured by | Time to migrate; Incidents after migration; Performance; Security findings. Each against an agreed baseline. |
| Governance | Human approval at 5 governance gates before anything reaches production. NDA available on request. |
| Delivery team | Based in Jaipur, India. A senior specialist replies within one business day. |
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Dotnet Application Development, end to end.
Each capability is delivered by the same team on the Agentic SDLC, with your approval at every critical step.
New applications
Enterprise-grade from day one.
- ASP.NET web apps and APIs
- Role-based security
- Azure and on-premise options
Legacy migration
Move safely.
- Code and dependency assessment
- Phased migration
- Parallel run and rollback
Data and SQL Server
Reliable data layers.
- Schema and query tuning
- Reporting
- Integration with other systems
Desktop and hybrid
Modernise Windows tools.
- Desktop application updates
- Web front-ends for desktop logic
- Offline considerations
Quality and security
Hardening.
- Automated tests
- Security review
- Documentation
A typical engagement, step by step.
Senior people lead every phase. Specialised AI agents on the Agentic SDLC handle the repetitive work, and nothing ships without your approval.
Discovery
Map how .NET systems works today, the systems and data involved, and agree the first measurable outcome.
Design
Design the workflows, roles, integrations and approval points for .NET systems.
Build in weekly demos
Your team sees working .NET systems software every week, with changes agreed in the open.
Launch and support
Data migration, training, go-live support and a measured 30-day review against the baseline.
Start small. Scale when it works.
Every engagement begins with a short, fixed-price step so you can judge the fit before committing further. See pricing.
Discovery Sprint
Teams deciding scope and priorities before they commit.
- Duration
- 2 weeks
- Pricing
- Fixed price
- Scoped plan and timeline
- Team and fixed price
- Process map or prototype
Fixed-scope first release
Teams that know what they need built.
- Duration
- Agreed in discovery
- Pricing
- Fixed price after discovery
- Written scope and acceptance criteria
- Weekly demos
- Handover with documentation
Transformation Pod
Multi-system programmes that run for years.
- Duration
- 12–36 months
- Pricing
- Annual contract
- Dedicated cross-functional team
- Quarterly business reviews
- One accountable partner
What we have shipped, and what a typical engagement looks like.
Delivered projects link to the full case study. Illustrative scenarios describe typical engagements and are not named client results.
Company on an old .NET Framework app
- Challenge
- Unsupported framework; only one developer knows the code.
- What we do
- Assessment and phased migration to modern .NET.
Scoped in a 2-week sprint
Free .NET systems review
Tell us where .NET systems hurts most. We map what to fix first, whether ready-made or custom fits, and a realistic first step.
- Where to start and why
- Ready-made vs custom view
- Indicative timeline
We agree targets before we start.
Every engagement has a baseline and a target on the measures that matter to you, reported at every read-out.
Dotnet Application Development questions.
Can you upgrade our old .NET Framework app?
Yes. We assess it first, then migrate in phases while keeping the business running.
Do you work with SQL Server and Azure?
Yes, and we also support other databases and clouds.
Can desktop software move to the web?
Often yes. We separate business logic and rebuild the interface as a web app.
Will migration stop operations?
We use parallel runs and rollback plans to avoid downtime where possible.
Do you support the system after migration?
Yes, under an annual agreement.
Often combined with.
Legacy Modernization
Upgrade safely.
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Read →Let's scope your Dotnet Application Development project.
Tell us where you are and where you want to be. A senior specialist will reply within one business day with next steps.
- Free 30-minute consultation
- Indicative estimate after the call
- NDA available on request