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.NET Application Development

From legacy monoliths to cloud-native microservices — modern .NET engineering at enterprise scale.

Engineering the Microsoft Enterprise

Legacy .NET Framework applications trap businesses on aging Windows Server operating systems, preventing cloud-native deployment, blocking containerization, and inflicting structural security vulnerabilities that Microsoft no longer patches. Every month these monoliths remain in production, the technical debt compounds and the modernization cost increases.

We refactor aging .NET Framework monoliths and design pristine greenfield applications using modern .NET 8+. Our architectures leverage microservices communicating via gRPC or REST, containerized for deployment on Azure Kubernetes Service or Azure App Service — running on lightweight Linux containers that cost 40% less than equivalent Windows Server VMs.

Our .NET engineering practice extends beyond backend APIs. Using Blazor WebAssembly and Server, we build rich interactive frontends entirely in C# — enabling full-stack development teams to deliver complete web applications without maintaining separate JavaScript frameworks. For real-time requirements, we implement SignalR architectures supporting tens of thousands of concurrent connections.

.NET Application Development

The Burden of Technical Debt

Ignoring these challenges compounds technical debt at an exponential rate — every quarter of inaction multiplies the eventual remediation cost.

01

Windows Server Lock-In

Old .NET Framework 4.x applications are completely restricted from running on cost-efficient Linux containers or modern serverless platforms — forcing organizations to maintain expensive Windows Server VM estates indefinitely.

02

Deployment Friction

Monolithic C# codebases take 30-60 minutes to compile and deploy as a single unit, making minor feature pushes a terrifying, all-hands-on-deck ordeal with high risk of regression across unrelated functionality.

03

Performance Ceilings

Modern .NET 8 delivers 3-5x performance improvements over .NET Framework for web workloads — dramatically reducing the cloud compute footprint required to handle the same request volume, directly lowering Azure hosting costs.

What We Deliver

Modern Microsoft ecosystem capabilities engineered for enterprise-scale transformation and measurable productivity improvement.

01

Cloud-Native API Engineering

Building massively scalable Web APIs and backend services from scratch using modern .NET 8+ with Clean Architecture principles. We design APIs that handle thousands of concurrent requests per second on minimal compute — using async programming patterns, efficient serialization, and connection pooling to maximize throughput per dollar of infrastructure.

.NET 8+ Minimal APIs and Controller-based Web APIs with OpenAPI documentation generation
Clean Architecture and CQRS (Command Query Responsibility Segregation) pattern implementations for complex domains
Entity Framework Core performance optimization with compiled queries, split queries, and projection-only reads
API Gateway patterns using YARP (Yet Another Reverse Proxy) for microservice routing and aggregation
02

Legacy Monolith Modernization

Surgically extracting monolithic .NET Framework applications into scalable microservices without the risk and cost of a full rewrite. We use the Strangler Fig pattern — gradually replacing legacy components with modern services while the old system continues operating, eliminating the need for a dangerous big-bang cutover.

WCF (Windows Communication Foundation) to gRPC and REST API transitions preserving contract compatibility
.NET Framework 4.x to .NET 8 migration using the .NET Upgrade Assistant and manual remediation of breaking changes
Monolith decomposition using Domain-Driven Design to identify bounded contexts for microservice extraction
State externalization moving in-process session state and cache to Redis, enabling horizontal scaling and container deployment
03

Blazor & Full-Stack C#

Creating rich, interactive web applications using Blazor WebAssembly and Server — eliminating the need for separate JavaScript frameworks. Your C# development team can build the entire application stack with a single language, sharing validation logic, data models, and business rules between client and server.

Blazor WebAssembly deployment for fully client-side rendered SPAs with offline capability
Blazor Server with real-time SignalR connection for latency-sensitive applications requiring server-side rendering
Component library development with reusable, tested Blazor components following the Atomic Design methodology
Progressive Web App (PWA) packaging enabling Blazor apps to install as native-feeling desktop and mobile applications
04

Containerization & DevOps

Packaging .NET applications into lightweight Docker containers and deploying them through automated CI/CD pipelines to Azure Kubernetes Service or Azure App Service. We design the container architecture, write production-grade Dockerfiles, and implement health checks, graceful shutdown handling, and horizontal pod autoscaling.

Multi-stage Dockerfile optimization producing minimal container images (typically under 100MB for .NET APIs)
Azure Kubernetes Service deployment with Helm charts, resource limits, and readiness/liveness probe configuration
Azure DevOps and GitHub Actions CI/CD pipeline development with build, test, scan, and deploy stages
Azure Container Apps deployment for simpler microservices that do not require full Kubernetes orchestration complexity

Software Engineering Methodology

How we build and modernize enterprise .NET applications with confidence.

01

Domain Discovery

We map your business entities, invariants, and workflow boundaries using Domain-Driven Design workshops. This produces the bounded context map that determines microservice boundaries, aggregate design, and data ownership — preventing the distributed monolith anti-pattern.

02

Architecture Selection

Based on domain complexity, scaling requirements, and team size, we select the deployment topology — Azure App Service (simplest), Container Apps (managed containers), or full AKS (maximum flexibility). We never over-engineer: simple domains get simple architectures.

03

Development & Testing

We develop using strict Test-Driven Development (TDD) principles with unit tests, integration tests against real database instances, and contract tests for API consumers. Every pull request passes automated quality gates before code review — catching regressions immediately.

04

Deployment & Monitoring

We configure CI/CD pipelines deploying to Azure through automated stages — build, test, security scan, staging deployment, smoke test, production promotion. Application Insights is configured for request tracing, dependency mapping, and performance alerting.

What You Receive

Every engagement produces concrete, actionable deliverables — not theoretical frameworks that require additional investment to become useful.

Architecture Decision Records

A documented collection of every significant technical decision — framework selections, database choices, authentication strategies, hosting models — with rationale, alternatives considered, and trade-offs accepted. This becomes your team's institutional knowledge base.

API Documentation

Auto-generated OpenAPI (Swagger) documentation with request/response examples, authentication requirements, and error code catalogs. Published as an interactive developer portal enabling frontend teams and external integrators to consume your APIs independently.

Infrastructure-as-Code Repository

A Terraform or Bicep repository defining all Azure infrastructure — App Services, AKS clusters, databases, networking, monitoring — as version-controlled, peer-reviewed code that can reproduce your entire environment from scratch in any Azure region.

Modernization Roadmap

For legacy modernization projects — a phased extraction plan mapping each monolith component to its target microservice, with dependency analysis, estimated effort, risk assessment, and recommended sequencing.

Frequently Asked Questions

Why should we migrate from .NET Framework 4.x to modern .NET?
Modern .NET runs cross-platform on Linux containers — cutting Azure hosting compute costs by 40% compared to Windows Server VMs. Performance improvements of 3-5x per request reduce the total infrastructure needed. Additionally, .NET Framework receives only security patches; all new features, performance improvements, and library updates target modern .NET exclusively.
Can you modernize our application without a complete rewrite?
Yes — and we strongly prefer incremental modernization over full rewrites. Using the Strangler Fig pattern, we gradually extract components from the monolith into modern microservices while the legacy system continues operating. This eliminates the risk and cost of a big-bang rewrite while delivering incremental improvements with every extraction.
Is Blazor production-ready for enterprise applications?
Yes. Blazor WebAssembly and Server are fully supported in .NET 8 LTS and used in production by enterprises globally. Blazor Server is particularly well-suited for internal line-of-business applications where the server-side rendering model provides excellent performance. Blazor WASM is ideal for public-facing SPAs requiring offline capability.
How do you handle database migrations during modernization?
We use Entity Framework Core Migrations for schema evolution with strict code review and automated rollback scripts for every migration. For data tier modernization (e.g., SQL Server to Cosmos DB), we implement the database-per-service pattern — new microservices get their own database while legacy components continue using the original database until fully extracted.

Ready to modernize your Microsoft stack?

Schedule a Microsoft Strategy Session