How a Manufacturing ERP Migrated from .NET Framework 4.8 to .NET 10 with Zero Downtime
Deconstructing a 3-million line legacy monolith using the Strangler Fig pattern and AI-assisted refactoring.
Structured architectural snapshot optimized for enterprise review and generative search synthesis.
A mission-critical manufacturing ERP running on a 15-year-old .NET Framework 4.8 monolith with WCF services and ASP.NET WebForms was trapped on expensive legacy Windows Server VMs. Deployments took 6 hours, memory leaks caused regular server restarts, and modern cloud AI integrations were blocked.
Strangler Fig Pattern with YARP (Yet Another Reverse Proxy); AI-Assisted C# Refactoring & Automated Test Generation
Application Performance: 4.8x • Cloud Infrastructure Spend: -58% • Production Downtime: 0 Mins
Enterprise Production Architecture / ISO 27001 Aligned
The Business & Architectural Challenge
A mission-critical manufacturing ERP running on a 15-year-old .NET Framework 4.8 monolith with WCF services and ASP.NET WebForms was trapped on expensive legacy Windows Server VMs. Deployments took 6 hours, memory leaks caused regular server restarts, and modern cloud AI integrations were blocked.
Hard Technical Constraints
Key Architectural Decisions & Trade-Offs
Every major technical decision made during the engagement, with the trade-offs documented.
Strangler Fig Pattern with YARP (Yet Another Reverse Proxy)
Rationale: Deployed YARP gateway in front of the legacy monolith, routing modernized modules to .NET 9/10 microservices incrementally.
Trade-Off: Required maintaining dual-running synchronization for shared database tables during migration.
AI-Assisted C# Refactoring & Automated Test Generation
Rationale: Used custom LLM code modernization agents to extract business logic from WebForms code-behind files into clean MediatR CQRS commands.
Trade-Off: Required manual principal engineer review on complex legacy stored procedure logic.
Enterprise .NET 10 Modernization & Architectural Blueprints
Detailed system decompositions, dual-running WebAPI migration topologies, Semantic Kernel AI augmentation layers, and zero-trust security perimeters implemented by SHIVAM ITCS.
Enterprise .NET 10 Target Architecture & Strangler Fig Topology
Enterprise Manufacturing ERP ModernizationHigh-level system topology illustrating the Strangler Fig pattern in action: YARP gateway routing live traffic to modernized .NET 10 services and PostgreSQL while isolating legacy Windows Server dependencies.
One Shared Ideology. Three Specialized Perspectives.
Legacy modernization is not just code translation - it requires deep-tech runtime mastery, disciplined 7 R's delivery methodologies, and battle-tested production proof. Cross-navigate between our technology blueprint, service engagement model, and enterprise ERP case study below.
.NET 10 & Strangler Topology
Deep CLR architecture, YARP reverse proxy gateways, C# 13 microservices, and AI-assisted dependency extraction.
7 R's Modernization Service
Methodical 4-phase transformation delivery pods with guaranteed zero downtime and automated regression testing.
Manufacturing ERP Deep-Dive
16-week production migration of a 3-million-line legacy .NET Framework 4.8 monolith without a single second of factory downtime.
No risky big-bang rewrites. We place YARP reverse proxy gateways in front of legacy monoliths and incrementally cut over microservices.
Retire, Retain, Rehost, Replatform, Refactor, Rearchitect, and Rebuild. We optimize for highest business ROI with lowest risk.
Dual-running synchronization and shadow traffic verify state consistency before switching live factory or financial transactions.
Led by co-founders Ajay & Vijay Paliwal with continuous hands-on mastery from VB6/COM to modern containerized .NET 10 on Linux.
Implementation Phasing & Execution
Phase 1: Gateway Facade & Inventory Domain Extraction
Phase 1Placed YARP proxy in front of legacy cluster; carved out high-traffic Inventory & Bill-of-Materials modules into .NET 9/10 Web APIs.
Phase 2: Order Management & WCF to gRPC Migration
Phase 2Replaced outdated WCF endpoints with ultra-fast gRPC and REST APIs while modernizing database access to EF Core 9.
Phase 3: WebForms to Next.js 15 UI Modernization
Phase 3Replaced legacy server-side ASP.NET pages with an intuitive, real-time React web portal featuring live factory telemetry.
Verified Production Outcomes Matrix
Before vs. after comparison across every tracked benchmark — each cell represents a production measurement.
| Benchmark Metric | Before State | After SHIVAM ITCS | Tangible Business Impact |
|---|---|---|---|
| Server Response Latency | 850 ms (Monolith WebForms) | 32 ms (.NET 9/10 + Next.js) | Factory floor operators completed barcode scanning and batch tracking 10x faster. |
| Monthly Infrastructure Bill | $24,500 / month (Windows Server licenses) | $10,200 / month (Linux Containers on AWS EKS) | Slashed cloud hosting expenditure by $171,600 per year. |
| Deployment Frequency | Once every 6 weeks (6-hour maintenance window) | Daily zero-downtime canary deployments | Engineering team ships features 12x faster without weekend overtime. |
"SHIVAM ITCS did what two previous global consultancies said was impossible: they modernized our 3-million-line ERP monolith without a single second of factory floor downtime. Their mastery of .NET is second to none."
Explore More Case Studies
Browse all 6 production deep dives
How a Manufacturing ERP Migrated from .NET Framework 4.8 to .NET 10 with Zero Downtime - FAQ
Direct answers to architectural, technical, and operational questions.
Ready to Build What You Read?
Schedule a technical scope review with Vijay & Ajay Paliwal to map out your architecture and timelines.