IMS Saigon

.NET Modernization: From Legacy Monoliths to Cloud-Native .NET 8

Migrate legacy .NET Framework applications, WCF services, and monolithic codebases to modular, containerized .NET 8 microservices without operational risk.

Proven .NET Modernization Capabilities

Engineering depth built around incremental architecture, high performance, and cloud elasticity.

Strangler Fig Migration Pattern

Replace legacy monolith capabilities step-by-step behind a reverse proxy routing layer, ensuring zero downtime and zero business disruption.

WCF to gRPC & Web APIs

Replace deprecated WCF endpoints with high-performance gRPC services and OpenAPI-compliant REST services running on modern .NET 8.

IIS to Linux Containers

Break away from expensive Windows Server licensing by containerizing applications into lightweight Linux Docker images running on Kubernetes or Azure Container Apps.

Performance & Memory Optimization

Leverage .NET 8 JIT improvements, Span<T>, and memory management to achieve up to 3x higher request throughput and 60% lower RAM footprint.

Architectural Blueprint

The Strangler Fig Migration Pattern

How we decompose legacy software risk-free through progressive domain extraction.

  1. 01

    Facade Layer Setup

    Deploy YARP (Yet Another Reverse Proxy) or Azure API Management in front of legacy monolith to capture 100% of traffic.

  2. 02

    Sliver Migration

    Extract high-value business domains into standalone .NET 8 microservices while keeping shared database views synced.

  3. 03

    Route Cutover

    Re-route proxy endpoints to new .NET 8 services incrementally with canary releases and immediate rollback capability.

  4. 04

    Decommissioning

    Decommission original legacy code paths once 100% of traffic and data validation tests pass seamlessly.

In .NET Modernization

.NET Modernization

.NET Modernization: From Legacy Framework to Cloud-Native .NET 8

Strangler Fig Pattern

The Strangler Fig Pattern: Modernize Without a Big-Bang Rewrite

Frequently asked questions

Why choose the Strangler Fig pattern over a big-bang rewrite?

Big-bang rewrites carry a 70%+ failure rate due to scope creep and unknown legacy logic. The Strangler Fig pattern migrates features incrementally behind a proxy, delivering business value in weeks rather than years while maintaining full operational continuity.

How do we handle shared legacy databases during migration?

We use database view facades, CDC (Change Data Capture), and outbox messaging patterns to maintain data consistency between legacy schema and new domain-driven .NET 8 microservices.

What performance improvements can we expect upgrading from .NET Framework to .NET 8?

Clients typically see a 2x-4x increase in HTTP request throughput, 50-70% lower memory utilization, and significant hosting cost reductions by shifting from Windows VMs to Linux container instances.

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