Skip to content

FIG 01 · .NET Development

.NET development services, on .NET 10 LTS

New ASP.NET Core apps and APIs, Blazor front ends and Azure or AWS deployments, plus fixed-scope upgrades from .NET 8, .NET 9 and .NET Framework to .NET 10, with the code in your repository from day one.

Book a callStart a project
See how it works
Backend developer at two monitors showing a code editor and a software architecture diagram

FIG 02 · Quick answer

What are .NET development services?

.NET development services cover building and maintaining web apps, APIs and internal systems on Microsoft’s .NET platform. Elgrith builds with C#, ASP.NET Core, Blazor and EF Core on Azure or AWS, and upgrades older apps to .NET 10, the current long-term-support release, since .NET 8 and 9 reach end of support on 10 November 2026.

New builds start on .NET 10 LTS
10
Projects delivered since 2015
1,000+
Clients across the USA, UK and India
250+
Your code, repository and IP
100%

FIG 03 · Why it matters

.NET 8 and .NET 9 run out of support on the same day.

From Microsoft’s .NET support policy (last updated 13 Oct 2026), Microsoft Lifecycle and the Stack Overflow Developer Survey 2025, checked on 23 Oct 2026.

FIG 04 · Version check

Is your .NET version supported?

Check the TargetFramework in your .csproj files (net8.0, net9.0, net48 and so on), or run dotnet --list-runtimes on the server, then find it below.

.NET and .NET Framework versions and official support dates
VersionRelease typeReleasedEnd of supportStatus, 23 Oct 2026
.NET 10LTS11 Nov 202514 Nov 2028Supported: new builds start here
.NET 9STS12 Nov 202410 Nov 2026Support ends 10 Nov 2026: upgrade to .NET 10
.NET 8LTS14 Nov 202310 Nov 2026Support ends 10 Nov 2026: upgrade to .NET 10
.NET 7, 6, 5 and .NET CoreMixed2022 or earlierEndedUnsupported: upgrade to .NET 10
.NET Framework 4.8.1Windows component9 Aug 2022No end date listedSupported with Windows: modernise on your timeline
.NET Framework 4.6.2Windows component2 Aug 2016Jan 2027Move to 4.8.1 or modern .NET

Dates from Microsoft’s .NET and .NET Core support policy (last updated 13 Oct 2026) and the Microsoft Lifecycle page for .NET Framework, which follows the Component Lifecycle Policy; both checked 23 Oct 2026. A new .NET version ships every November, so plan an upgrade at least every two years to stay on a supported LTS.

Need CI/CD and containers for the upgrade? DevOps consulting

FIG 05 · What you get

What our .NET development services cover

C# and .NET 10 for product teams, enterprises and businesses replacing spreadsheets: web apps, APIs, integrations and the cloud they run on, from the first commit to the support after launch.

Hand-drawn software architecture diagram with one box in blue, beside a laptop code editor and an espresso
.NET Development · built in-house

01

ASP.NET Core web apps

ASP.NET development services for customer portals, internal tools and SaaS products, with Razor Pages or MVC, Identity or Entra ID sign-in, and tests from the first sprint.

02

Web APIs and Minimal APIs

REST and gRPC APIs on ASP.NET Core, versioned, documented with OpenAPI and protected with JWT or OAuth, for the web and mobile apps that use them.

03

Blazor front ends

Interactive web UIs written in C# with Blazor, so one team and one language cover the front end and the back end when that fits the product.

04

Data with EF Core

Entity Framework Core on SQL Server or PostgreSQL, with migrations in the repository, indexes that match the real queries and slow queries fixed.

05

Integrations

ERPs, CRMs, payment providers, Microsoft 365 and legacy SOAP services connected through typed clients, queues and retries, not one-off scripts.

06

Azure or AWS

Azure App Service, Container Apps and Azure SQL, or AWS containers and managed databases, set up as code with CI/CD and staging.

07

Desktop and Windows apps

WPF and WinForms apps kept running and moved to modern .NET where that makes sense, and .NET MAUI where one C# codebase must reach desktop and mobile, scoped case by case.

08

.NET upgrades and rescues

Apps on .NET 8, .NET 9, older .NET Core or .NET Framework moved to .NET 10 LTS, with tests written first where they are missing.

Deliverables

11

deliverables, in writing

Included in every build, written into your fixed quote before work starts.

FIG 06 · Upgrade path

.NET 8 and 9 → .NET 10 upgrades

Moving from .NET 8 or 9 to .NET 10 is usually a retarget plus package updates, not a rewrite. We scope it as a fixed job, test it on staging and ship it with a rollback ready.

  • 1. Audit

    Check
    Every TargetFramework, the SDK and global.json
    Find
    Outdated and vulnerable NuGet packages
    Output
    A written upgrade plan in your fixed quote

  • 2. Tests first

    Add
    xUnit or NUnit tests around the money paths
    Why
    Proof the app still works after the retarget

  • 3. Retarget to net10.0

    Change
    Project files, SDK and container base images
    Read
    Microsoft’s breaking-change lists for .NET 10 and ASP.NET Core

  • 4. Packages and EF Core

    Update
    EF Core, ASP.NET Core and third-party packages
    Swap
    Abandoned packages for maintained ones

  • 5. CI and staging

    Pipeline
    Builds and tests on the .NET 10 SDK
    Staging
    Real data shape, real integrations
    DevOps Consulting

  • 6. Release

    How
    A planned deploy with a rollback ready
    Then
    A date for the next LTS move, before support ends
    Cloud & Deployment

FIG 07 · Modernisation

.NET Framework modernisation: what ports and what gets rewritten

.NET Framework 4.8.1 is still supported as a Windows component, so there is no forced date. The cost of staying is Windows-only hosting and a shrinking pool of libraries. We move apps to .NET 10 one area at a time, with the old app running until the new one takes over.

06principles

  • Ports cleanly: MVC and Web API

    ASP.NET MVC controllers and Web API endpoints move to ASP.NET Core with changes to startup, configuration, routing and auth.

  • Class libraries

    Business logic in class libraries usually retargets with small changes once Windows-only APIs and old packages are found.

  • Needs rework: Web Forms

    Web Forms does not exist in ASP.NET Core. Pages are rebuilt in Razor Pages, Blazor or a separate front end, screen by screen.

  • Needs rework: WCF services

    WCF server is not part of modern .NET. Services move to gRPC or REST, or to CoreWCF when clients can’t change.

  • Strangler pattern

    A YARP reverse proxy routes traffic, new ASP.NET Core endpoints take over one area at a time, and the old app is switched off last.

  • Hosting moves

    Off Windows servers and onto containers, Azure or AWS, once the app runs on modern .NET.

    Cloud migration

FIG 08 · Naming

“.NET Core” vs “.NET”: the naming, explained

If you are looking for .NET Core development services, you want modern .NET. Microsoft dropped “Core” from the runtime’s name after .NET Core 3.1: the next release was .NET 5, and every version since, up to .NET 10, is the same cross-platform runtime.

06principles

  • .NET Framework (1.0 to 4.8.1)

    The original Windows-only runtime. Still supported as a Windows component; 4.8.1 is the version to be on.

  • .NET Core 1.0 to 3.1

    The cross-platform rewrite of .NET. Every .NET Core version is now out of support.

  • .NET 5 and later

    The same runtime, renamed. .NET 10 LTS is current; .NET 8 and 9 reach end of support on 10 Nov 2026.

  • ASP.NET Core

    The web framework on modern .NET. It kept “Core” in its name, so ASP.NET Core 10 runs on .NET 10.

  • Entity Framework Core

    The data-access library for modern .NET. EF Core 10 pairs with .NET 10; EF6 remains for Framework apps.

  • .NET MAUI

    Cross-platform UI for mobile and desktop from one C# codebase, the successor to Xamarin.Forms.

FIG 09 · Hire

Hire .NET developers

Dedicated .NET developers who join your stand-ups, work in your repository and follow your code review rules, managed from our New Delhi HQ.

06principles

  • Dedicated .NET developer

    One full-time C# developer on your product, working in your tools and your sprint.

  • .NET team extension

    Developers, a tester and a lead added to your team for a release, an upgrade or a backlog.

  • Fixed-scope project

    A defined app, upgrade or migration for a fixed quote, delivered in sprints with weekly demos.

  • How dedicated teams work

    Interviews, onboarding, replacements and hand-over, explained.

    Hire dedicated developers

  • APIs and integrations

    Payments, CRMs, ERPs and the other systems your .NET app talks to.

    API integration

  • Full web app builds

    Design, front end and back end from one team.

    Web app development

Cloud

Upgrading .NET and moving off your own servers?

A .NET 10 upgrade is a good moment to leave ageing Windows servers. We plan the runtime upgrade and the move to Azure or AWS together, so you test once and cut over once.

Cloud migration

FIG 10 · Process · 6 steps

.NET development company: how we work

A fixed written quote after a free call, sprints with weekly demos, and an upgrade calendar so the app never drifts out of support. We claim no Microsoft partner tier: judge us on the code we ship, which stays in your repository.

Book a call
  1. Step 01

    Free call

    Tell us what you are building or what is breaking. We ask about users, data, integrations and deadlines, not just the framework.

  2. Step 02

    Code or idea review

    For a new app: users, data model and integrations. For an existing app: .NET and package versions, test coverage, hosting and the parts of the code nobody wants to touch.

  3. Step 03

    Fixed written quote

    A written scope, a fixed quote and the plan for versions, hosting and hand-over, before any work starts.

  4. Step 04

    Sprints with weekly demos

    Two-week sprints in your repository, with pull requests you can read, tests in CI and a demo on staging every week.

  5. Step 05

    Launch

    A planned release to Azure, AWS or your own servers, with health checks, a rollback ready and the next upgrade date written down.

  6. Step 06

    Support and upgrades

    Security releases applied in a patch window agreed in your written scope, plus planned upgrades before your versions lose support.

FIG 11 · What you get

Everything included

Written into your fixed quote, so you know exactly what you are paying for before work starts.

11items

  • Written scope and fixed quote
  • Version and package audit for existing apps
  • .NET 10 app or API in your repository
  • Database schema under EF Core migrations
  • xUnit or NUnit tests in CI
  • OpenAPI docs for your front-end and mobile teams
  • Deploy pipeline and staging environment
  • Infrastructure as code for Azure or AWS
  • Upgrade calendar for .NET and packages
  • Runbooks and hand-over notes
  • IP assignment: code and data are yours

FIG 12 · Tech & tools

The tools behind the work

Proven, well-supported tools, chosen for your project and set up in accounts your business owns.

  • .NET 10
  • C# 14
  • ASP.NET Core
  • Minimal APIs
  • Blazor
  • Entity Framework Core
  • SignalR
  • gRPC
  • .NET MAUI
  • CoreWCF
  • YARP
  • xUnit
  • SQL Server
  • PostgreSQL
  • Redis
  • Azure App Service
  • Azure Container Apps
  • AWS
  • Docker
  • GitHub Actions
  • Azure DevOps

FIG 13 · Who it’s for

.NET work for teams that need it built, upgraded or kept current.

New builds, upgrades and dedicated developers, with the same rules: your repository, your IP, supported versions.

4 audiences

Product teams

New .NET 10 apps and APIs.

SaaS products, portals and internal tools built on ASP.NET Core and .NET 10, with a Blazor, React or Angular front end.

  • Started on .NET 10 LTS
  • OpenAPI docs from day one
  • Tests in CI
  • Azure or AWS as code

FIG 14 · Working with us from the USA and UK

Built in New Delhi. Run on your hours.

Every project gets a point of contact in New York or London and an engineering team in New Delhi. Here is how today’s working days line up, live.

Three ways to work together

  1. 01

    Fixed-scope project

    A written scope, one fixed price and a dated plan. Suits websites, apps and MVPs.

  2. 02

    Dedicated team

    Designers and engineers on your roadmap every month, billed monthly.

  3. 03

    White label

    For US and UK agencies: our work, your brand, unbranded deliverables.

Every engagement

  • Fixed quote in USD, GBP or INR after a free 30-minute call
  • NDA before discovery. You own all code, designs and content
  • A working demo every sprint, not status slides
  • Reply within one business day, calls inside your hours
Book a call

Calls on ET or UK hours

FIG 15 · Hire

Dedicated .NET developers vs team extension vs fixed-scope project

We don’t publish rates. This is how the three ways to work with .NET developers compare.

Dedicated .NET developers vs team extension vs fixed-scope project
Dedicated developerTeam extensionFixed-scope project
Best forA steady backlog on one productA release or a backlog spikeA defined app, upgrade or migration
Who manages the workYou, in your sprintYou, with our leadUs, against a written scope
How it is pricedMonthly, per developerMonthly, per teamOne fixed quote
Code and IPYoursYoursYours
Read our 2026 custom software development cost guide

FIG 16 · Compare

.NET or Java for enterprise apps?

.NET or Java for enterprise apps?
.NET (C#)Java
Main web frameworkASP.NET CoreSpring Boot
Current long-term release.NET 10 LTS, supported to 14 Nov 2028Java 25 LTS, released 16 Sep 2025
Release rhythmA new version every NovemberA feature release every six months, an LTS every two years
Strong fitMicrosoft-centred estates, Azure, SQL Server, Windows desktopJVM estates, Kafka-heavy data, large integration back ends
HostingLinux or Windows, containers, any major cloudLinux containers, any major cloud
Our pageYou are hereJava development

FAQ

Frequently asked questions

Straight answers about .NET Development with Elgrith.

On 10 November 2026. Microsoft’s .NET support policy (last updated 13 October 2026, checked 23 October 2026) lists the same end date for .NET 9. After it, neither version gets patches, so apps on either should move to .NET 10, which is supported until 14 November 2028.

FIG 17 · Related

Keep exploring

All services

Free 30-minute call

Get onto .NET 10 LTS.

Tell us about the app you need, or the .NET version you are stuck on. After a free call you get a written scope, an upgrade plan if you need one, and a fixed quote.

Book a callStart a project

connect@elgrith.com+91 96039 20001Start a project

Pick a day for your call

Open

Pick a day. You'll choose a time in your own time zone on the next step.

See all times