Modernize Your .NET Applications Without Starting Over
Argos migrates .NET Framework applications to modern .NET version and Azure incrementally, without disrupting operations. Whether you’re modernizing legacy systems or building greenfield cloud solutions, you get deep platform expertise and a proven migration approach.
Your .NET Infrastructure Is Aging. But Rewriting Everything Isn't Realistic.
Companies invested in the Microsoft stack face a common dilemma: legacy .NET applications built on .NET Framework 4.x are still running business-critical operations, but the platform is no longer receiving feature updates. Modern .NET 8 offers cloud-native capabilities and performance improvements—but migrating isn’t simple.
Legacy Apps Can't Run in Modern Cloud Environments
Applications built on .NET Framework 4.x require Windows Server and IIS. This limits deployment options, increases infrastructure costs, and prevents cloud-native patterns like containers, serverless, and auto-scaling.
Legacy Code Dependencies Block Migration
.NET Framework applications often rely on libraries and Windows-specific APIs that don’t exist in modern .NET. Web Forms, WCF services, System.Web dependencies—all require refactoring strategies.
No Modern API Layer for Integrations
Legacy .NET apps expose SOAP web services or have no API at all. Modern SaaS platforms require REST APIs with JSON, OAuth2 authentication, and webhook support. Without APIs, you can’t integrate with Salesforce, Stripe, or build mobile apps.
Security Vulnerabilities in Aging Frameworks
.NET Framework 4.x reached end-of-life for new features. Security patches continue, but dependencies (jQuery, AngularJS 1.x, old Bootstrap) go unpatched—creating compliance risks and audit failures.
Migrate, Modernize, and Integrate—Without Disrupting Operations
Incremental migration, cloud-native architecture, and modern API layers — all while keeping your existing systems running.
Phased .NET Framework to .NET Core Migration
We don’t recommend big-bang rewrites. Instead, we migrate applications incrementally using the Strangler Fig pattern:
- check_smallDiscovery: Inventory dependencies, identify migration blockers, create roadmap
- check_small Foundation: Create .NET 8 solution structure, establish CI/CD pipelines
- check_smallMigrate Module-by-Module: Prioritize high-value, low-risk modules first
- check_smallProgressive Cutover: Run old and new side-by-side, route traffic progressively
Cloud-Native Architecture on Azure
For greenfield projects or fully modernized applications, we architect cloud-native solutions leveraging Azure’s platform services:
- check_smallApplication: ASP.NET Core APIs, Blazor UIs, Azure Functions for event-driven workflows
- check_small Data: Azure SQL Database, Cosmos DB, Redis Cache, Blob Storage
- check_smallIntegration: Azure Service Bus, Event Grid, API Management
- check_smallSecurity: Azure AD, Managed Identity, Key Vault, Front Door WAF
Modern API Development & Integration
REST APIs and integrations that connect legacy systems to modern platforms:
- check_smallASP.NET Core Web API with OpenAPI documentation
- check_small Authentication: JWT tokens, API keys, OAuth2
- check_smallIntegrations: Salesforce, QuickBooks, Stripe, Shopify, UPS/FedEx
- check_smallWebhook support for real-time event notifications
A Full Product Pod. Not a Rotating Cast of Developers.
Role - Product Manager
Discovery, requirements, roadmap, stakeholder alignment, sprint prioritization
Role - UX Designer
User flows, clickable prototypes, UI design, usability testing
Role - Code Architect
Architecture decisions, code review, security oversight, technical governance
Role - Engineers (2–3)
Full-stack development, complex business logic, integrations
Role - QA Engineer
Test planning, execution, automation, quality assurance
Microsoft Ecosystem Specialists
Argos builds exclusively on Microsoft technologies for companies invested in the ecosystem. We don’t dilute expertise across multiple stacks—we go deep on .NET and Azure.
.NET Platform
Backend: ASP.NET Core, C# 12, Entity Framework Core, Minimal APIs, gRPC, MassTransit
Frontend: Blazor Server, Blazor WebAssembly, Razor Pages, MVC
Mobile: .NET MAUI for cross-platform iOS, Android, Windows
Background: Hangfire, Azure Functions, Hosted Services
Azure Cloud Platform
Compute: App Services, Azure Functions, Container Apps, AKS
Data: Azure SQL, Cosmos DB, Blob Storage, Redis Cache
Integration: Service Bus, Event Grid, API Management, Logic Apps
Security: Azure AD (Entra ID), Key Vault, Managed Identity, Front Door
DevOps: Azure DevOps, Application Insights, Azure Monitor, Log Analytics
Why Argos
Deep .NET Expertise (20+ Years)
We’ve been building .NET applications since .NET Framework 1.0 (2002). We’ve migrated dozens of applications from Web Forms to MVC to Blazor. We know the platform’s history, evolution, and future direction—not just the latest tutorial.
Azure-First Cloud Architecture
Argos builds exclusively on Azure for cloud deployments. We’re not cloud-agnostic generalists—we go deep on Azure’s PaaS services, know the cost optimization tricks, and leverage managed services to reduce operational burden.
Prototype-First Delivery
We follow a structured delivery lifecycle: Discovery → Prototype → Build → Measure → Improve. We recommend incremental migration using Strangler Fig pattern—not big-bang rewrites. Phased approaches reduce risk and deliver value continuously.
Enterprise-Grade Quality
We build production systems with proper architecture, security, monitoring, and documentation. You get code that passes technical due diligence, not proof-of-concept code promoted to production.
Frequently Asked Questions
About .NET & Cloud Engineering
indeterminate_question_boxShould we migrate from .NET Framework to .NET 8?
Yes, if you’re on .NET Framework 4.x and facing infrastructure costs, recruitment challenges, or need cloud-native capabilities. .NET Framework reached end-of-life for new features. Migrating to .NET 8 reduces infrastructure costs significantly (Linux containers vs Windows VMs), improves performance, and modernizes your tech stack for recruitment. However, don’t migrate if the application is scheduled for retirement within 18 months.
indeterminate_question_boxHow long does migration take?
Timeline varies by application size. Small applications (50K-100K lines): 6-10 weeks. Medium applications (100K-300K lines): 10-20 weeks. Large applications (300K+ lines): 20-32 weeks. We use incremental migration (Strangler Fig pattern) so business continuity is maintained throughout.
indeterminate_question_boxCan you migrate Web Forms to Blazor?
Yes. Web Forms has no direct equivalent in modern .NET, so UI must be rewritten. We typically replace Web Forms with Blazor Server (for internal apps) or Blazor WebAssembly (for customer-facing apps). Business logic and data access layers can often be migrated with minimal changes.
indeterminate_question_boxCan you add APIs without full migration?
Yes. We build ASP.NET Core Web API layer as abstraction over existing .NET Framework application. The API reads from and writes to the legacy database, enabling integrations (Salesforce, Shopify, mobile apps) without disrupting the existing application. This is a common first step before full migration.
indeterminate_question_boxHow do you ensure zero downtime during migrations?
We use blue-green deployment or canary release patterns. Old and new systems run side-by-side during migration. We progressively route traffic (10% → 50% → 100%) to the new system while monitoring for issues. If problems arise, we route back to the old system.
Modernize Without Disrupting Operations
Discovery Call
We’ll discuss your current .NET infrastructure, modernization goals, timeline and budget constraints, and assessment scope. Free, 30 minutes.
Technical Assessment
Code and infrastructure analysis, migration blocker identification, performance profiling, cloud architecture recommendations, detailed roadmap with effort estimates.
Prototype-First Execution
Clickable prototype for stakeholder validation, module-by-module migration, side-by-side deployment, progressive traffic cutover, knowledge transfer and documentation.
Modernize Your .NET Infrastructure Without Ripping and Replacing
Argos has migrated dozens of .NET Framework applications to modern .NET 8, reduced infrastructure costs, and unlocked cloud-native capabilities—all while maintaining business continuity.