.NET Application Support & Upgrades
for Perth, Melbourne, Sydney, Brisbane businesses.
.NET Framework to .NET 8 migration, version upgrades, security patching, cloud migration, and ongoing support. If your .NET application needs a developer, we can help.
We also take over .NET codebases from previous developers. Perth-based, Australia-wide.
Your .NET application deserves a developer who understands the ecosystem
.NET is one of the most capable enterprise development platforms. But .NET applications that have not been maintained face real challenges — .NET Framework stuck in maintenance mode, outdated NuGet packages with security vulnerabilities, EOL runtime versions, and developers who have moved on.
The most common situation: A .NET Framework application running on IIS, built years ago, serving the business reliably. But the original developer is gone. The framework is falling behind. New features are harder to add. A security audit has flagged the EOL runtime.
We migrate .NET Framework applications to .NET 8, upgrade between modern .NET versions, patch security issues, take over codebases, and provide ongoing support. If your .NET application needs attention, we handle it.
.NET support services — by type
Framework migration, version upgrades, security patching, ongoing support, and cloud migration. Whatever your .NET application needs.
.NET Framework → .NET 8/9 Migration
.NET Framework (4.x) is in maintenance mode — Microsoft will not add new features. .NET 8 and 9 (the modern, cross-platform .NET) are where all the investment is going. Performance is dramatically better, cross-platform support, better cloud deployment, and active development.
We migrate ASP.NET MVC and Web API applications from .NET Framework to .NET 8 or 9. This involves updating project files to SDK-style, migrating NuGet packages, replacing System.Web dependencies, updating authentication, and resolving breaking changes.
Not every .NET Framework application can be migrated incrementally. We assess whether YARP (reverse proxy) sidecar migration, strangler fig pattern, or full rebuild is the best approach for your codebase.
.NET Version Upgrades
Already on .NET Core or .NET 5/6/7? Version upgrades to .NET 8 or 9 are usually straightforward — but still require testing. Breaking changes between versions, deprecated APIs, and updated NuGet packages need attention.
.NET 6 LTS support ended November 2024. .NET 7 was a short-term release (already EOL). .NET 8 is the current LTS with support until November 2026. Keeping current means security patches and performance improvements.
We handle the upgrade, test everything, and deploy to staging before production. Entity Framework migrations, Identity changes, Minimal API updates, and Blazor component updates are all covered.
Security Patching & Vulnerability Fixes
.NET applications with security vulnerabilities — outdated NuGet packages with CVEs, SQL injection via raw queries, XSS in Razor views, insecure authentication configuration, or CSRF protection gaps.
We run dependency audits (dotnet list package --vulnerable), static analysis, and manual code review. Vulnerabilities are prioritised by severity and fixed. NuGet packages updated to patched versions.
For applications on end-of-life .NET versions (.NET Core 2.1, 3.0, .NET 5, .NET 7), the most important security fix is the version upgrade itself. Microsoft does not patch EOL versions.
Ongoing .NET Application Support
Monthly support plans for .NET applications. Bug fixes, security monitoring, NuGet dependency management, performance optimisation, and small feature requests. A developer who knows your codebase.
Proactive monitoring: uptime, error tracking (Sentry, Application Insights), performance metrics, and NuGet vulnerability scanning. Issues caught before your users notice. Monthly reports on application health.
Previous developer left? We take over .NET codebases. Audit the architecture, document the solution structure, set up CI/CD (Azure DevOps or GitHub Actions), and resume development. No judgement about the code — we just pick it up.
Azure / AWS Cloud Migration
.NET applications running on on-premises Windows Server moved to Azure or AWS. App Service, Azure SQL, Azure AD integration, and managed services replace self-managed infrastructure.
IIS on a Windows Server in the office or a data centre replaced with Azure App Service or AWS Elastic Beanstalk. SQL Server on a VM replaced with Azure SQL Database or AWS RDS. File storage moved to Azure Blob or S3.
The cloud migration often happens alongside the .NET version upgrade. Moving from .NET Framework on IIS to .NET 8 on Azure App Service (Linux) is a common and well-trodden path.
Job management platform hitting 95% SLA compliance
We built a facilities management platform with job dispatch, SLA tracking, contractor coordination and asset management. Response times improved dramatically.
Read the full case study →Why modern .NET is worth the migration investment
.NET 8 is dramatically faster than .NET Framework
Benchmarks show .NET 8 handling 2-5x more requests per second than .NET Framework for typical web API workloads. JSON serialisation is faster (System.Text.Json), the JIT compiler produces better code, and the runtime is more efficient.
For applications under load, the upgrade to modern .NET can defer hardware scaling. The same server handles more traffic. For cloud-hosted applications, this directly reduces compute costs.
ASP.NET Core Minimal APIs are even lighter than MVC controllers for API workloads. For microservices and API-heavy applications, the performance improvement is significant.
Run on Linux, macOS, and Windows
.NET Framework is Windows-only. Modern .NET runs on Linux, macOS, and Windows. This means cheaper Linux hosting, Docker containers, and Kubernetes deployment — options that .NET Framework applications cannot use.
Azure App Service on Linux costs less than Windows. AWS Lambda supports .NET on Linux. Docker containers with .NET 8 are smaller and start faster than Windows containers.
Cross-platform also means your development team can work on macOS or Linux, not just Windows. More developer flexibility, and CI/CD pipelines can run on cheaper Linux build agents.
.NET Framework is in maintenance — modern .NET is where the investment is
Microsoft ships a new .NET version every November. New features, performance improvements, and language enhancements. C# 12, 13 with modern language features. .NET Framework gets security patches only — no new features, ever.
The ecosystem has moved. New NuGet packages target .NET 6+ or .NET 8+. Entity Framework Core has replaced Entity Framework 6. Blazor, Minimal APIs, and gRPC are modern .NET only. Staying on .NET Framework means falling further behind.
Microsoft documentation and learning resources focus on modern .NET. Stack Overflow answers increasingly target .NET 8. The developer community has moved on. Staying on .NET Framework means working against the current.
Built for cloud deployment
Modern .NET is designed for cloud-native deployment. Docker support, health checks, configuration from environment variables, structured logging, and dependency injection built into the framework.
.NET Aspire for cloud-native orchestration. Azure App Service, AWS Lambda, Google Cloud Run, and Kubernetes all have first-class .NET support. Modern .NET applications deploy to the cloud naturally.
For applications currently running on IIS in a data centre, the path to cloud is: upgrade to modern .NET, containerise, deploy to cloud. The upgrade is the first step.
.NET support and maintenance services
Emergency fixes, security audits, code takeovers, and monthly support plans.
Emergency .NET Fixes
Production down? Critical bug? Security breach? We respond quickly to .NET emergencies. Diagnose, fix, and deploy.
NuGet Dependency Management
Outdated packages, version conflicts, and abandoned libraries. We untangle NuGet dependencies and update to maintained versions.
Security Audit
Vulnerability scan, NuGet audit, authentication review, and penetration testing for .NET applications.
Code Takeover
Previous .NET developer left? We audit the solution, document the architecture, set up CI/CD, and resume development.
Performance Optimisation
Slow .NET application profiled and optimised. Database queries, caching, async processing, and memory management.
Monthly Support Plans
Retainer-based support with allocated hours. Bug fixes, security patches, dependency updates, and feature development.
.NET Support
Need your .NET application upgraded or maintained?
Send us access to the solution and we will audit it. Clear report, fixed-price quote, no obligations.
.NET support situations we handle regularly
If one of these sounds familiar, we can help.
.NET Framework → .NET 8
Legacy ASP.NET MVC or Web API application on .NET Framework 4.x migrated to modern .NET for performance, cross-platform, and continued support.
Web Forms → Modern ASP.NET
Legacy ASP.NET Web Forms application modernised. Web Forms is a dead-end — migration to Razor Pages, MVC, or Blazor provides a sustainable path.
WCF → gRPC or REST
Windows Communication Foundation services migrated to gRPC or REST APIs on ASP.NET Core. WCF is not supported on modern .NET.
Developer Left — Need a Takeover
Previous .NET developer or agency gone. Codebase needs to be understood, documented, and maintained by a new team.
On-Premises → Azure
.NET application on a Windows Server in the office moved to Azure App Service, Azure SQL, and Azure AD.
Security Compliance Fix
Security audit flagged vulnerabilities. EOL framework, outdated packages, or insecure authentication fixed to meet compliance requirements.
.NET migration process — step by step
From solution audit to post-migration monitoring. Staged deployment with rollback plans.
Technologies alongside .NET support
The frameworks, databases, and platforms involved in .NET support and migration work.
ASP.NET Core
Modern web framework for .NET. MVC, Razor Pages, Minimal APIs, and Blazor. The migration target for .NET Framework web applications.
SQL Server / Azure SQL
The database behind most .NET applications. May also need upgrading alongside the .NET migration.
Azure
Microsoft's cloud platform. App Service, Azure SQL, Azure AD, and Azure DevOps. Natural cloud destination for .NET applications.
Entity Framework Core
ORM for .NET. Migration from EF6 to EF Core is part of the .NET Framework → .NET 8 migration.
React / Angular Frontend
Many .NET applications have a JavaScript frontend. The frontend may also need updating alongside the backend migration.
Docker
Containerisation for .NET applications. Deploy to Azure Container Apps, AWS ECS, or Kubernetes.
Our ASP.NET MVC application on .NET Framework 4.6 was getting increasingly difficult to maintain. HELLO PEOPLE migrated it to .NET 8 in twelve weeks. The application is noticeably faster, we can deploy to Linux now, and new NuGet packages actually work.
Common questions about .NET application support
Is .NET Framework still supported?
.NET Framework 4.8 is in maintenance mode. Microsoft provides security patches but no new features. It ships with Windows, so it will not disappear, but all development investment goes to modern .NET (.NET 8, 9, etc.). If your application needs to evolve, migration is the path.
How much does a .NET Framework migration cost?
Small applications (1-3 projects, straightforward dependencies): $10,000 to $25,000. Medium applications (5-10 projects, EF6, complex authentication): $25,000 to $60,000. Large enterprise solutions: $60,000+. We audit first and provide a fixed-price quote.
How long does the migration take?
Small applications: 4 to 8 weeks. Medium applications: 8 to 16 weeks. Large solutions: 16 to 32+ weeks. The main variables are the number of projects, .NET Framework-specific dependencies, and the complexity of the existing codebase.
What about ASP.NET Web Forms?
Web Forms is the hardest migration path. There is no equivalent in modern .NET. Web Forms applications are typically rebuilt using Razor Pages, Blazor Server, or an SPA frontend (React/Angular) with an API. We scope the rebuild and help you decide the best approach.
Can we stay on .NET Framework and just upgrade packages?
For now, yes. .NET Framework 4.8 receives security patches. But NuGet packages are increasingly targeting .NET 6+ or .NET 8+ only. Entity Framework Core has replaced EF6 for new development. The longer you wait, the harder the eventual migration becomes.
What about WCF services?
WCF is not available on modern .NET. Options: CoreWCF (community port, limited), gRPC (high-performance, binary protocol), or REST APIs (more universal). We assess your WCF usage and recommend the right replacement.
Can you take over our .NET application from another developer?
Yes. We audit the Visual Studio solution, document the architecture, set up proper CI/CD, and start maintaining the application. This is a common scenario — internal developers leave, agencies close, and the code needs a new maintainer.
Do you work with Azure DevOps?
Yes. Azure DevOps for source control, CI/CD pipelines, work items, and test plans. We also work with GitHub Actions, GitLab CI, and other CI/CD platforms. We use whatever your team already uses.
Get Started
.NET application need a developer?
Migration, security fix, code takeover, or ongoing support — tell us what your .NET application needs.
Tell Us About Your .NET Application
Describe the application, the .NET version, and what you need. We will audit and come back with a plan.
Prefer a quick chat? Call 0425 531 127 – we're Perth-based and we answer the phone.