.NET Migration
.NET Modernization
Migrate legacy .NET Framework applications to .NET 8. WCF to REST, Windows Services to background workers, SOAP to JSON. Incremental migration without the risk of a big-bang rewrite.
UN
WCF to REST: UN Global Compact
150+
Projects delivered
8+
Years .NET
90%+
Client satisfaction
Migration Patterns
What We Migrate
WCF to REST API migration
WCF was deprecated with .NET Core and has no equivalent in modern .NET. We migrate SOAP/WCF contracts to REST (ASP.NET Core Minimal API or Controllers) and gRPC where binary protocol performance matters. Clients migrate incrementally, not all at once.
.NET Framework to .NET 8 LTS upgrade
Full codebase migration from .NET 4.x to .NET 8. We handle package compatibility issues, System.Web removal, Startup class restructuring, configuration changes, and test suite updates. We start with a compatibility analysis before writing any code.
Windows Services to background workers
Windows Services do not exist in .NET Core. We migrate them to hosted IHostedService / BackgroundService workers, containerizable and deployable to Azure, AWS ECS, or on-premises Linux hosts.
SOAP to JSON API modernization
Legacy SOAP integrations are replaced with JSON REST or GraphQL APIs. We negotiate with upstream vendors where possible and build adapters where not. Type safety maintained via C# records and OpenAPI contracts.
Monolith decomposition
Extracting bounded contexts from a .NET monolith into independently deployable services. We do this incrementally, starting with the highest-change or highest-risk modules, not with a total rewrite that puts everything in flight at once.
Database migration and ORM upgrade
EF6 to EF Core migration, schema modernization, query optimization. We have also migrated from stored-procedure-heavy SQL Server architectures to application-layer query logic without breaking existing integrations.
Tech Stack
Technologies We Work With
Why FriendsBit
What Sets Us Apart
We completed a WCF to REST migration for the United Nations Global Compact. The system processed document indexing workflows for a UN initiative and required zero downtime during cutover.
We have worked on healthcare and government .NET systems where risk tolerance is near-zero. Incremental migration over big-bang rewrites is not a preference, it is a constraint we have actually operated under.
We do fixed-price assessments before any migration work begins. You get a migration plan, a dependency audit, a risk register, and a cost estimate. No surprises mid-project.
.NET 8 LTS, C#, ASP.NET Core, EF Core, and Azure are our daily tools. We are not a generalist shop that learned .NET for one client.
Further Reading
Related Articles
Common Questions
Frequently Asked Questions
How much does .NET Core migration cost?
A .NET Framework to .NET 8 migration typically costs between $15,000 and $80,000 depending on codebase size, number of WCF services, third-party dependencies, and whether you need zero-downtime deployment. We offer a fixed-price assessment (typically $3,000 to $5,000) that produces a migration plan with a firm cost estimate before any code is written.
Can you migrate WCF services to REST without a rewrite?
Yes. We have done this at the United Nations and for healthcare government systems. The approach is a strangler-fig pattern: new REST endpoints are added alongside existing WCF services, clients migrate gradually, and WCF services are decommissioned once traffic has shifted. This avoids a big-bang cutover.
What .NET versions do you migrate to?
We migrate to .NET 8 (current LTS) and .NET 9. We do not recommend .NET 7 or earlier non-LTS versions for new production targets.
Ready to modernize your .NET system?
We start with a fixed-price assessment. You get a migration plan and cost estimate before any work begins.
Get an assessment