VFP → .NET Conversion

Convert Visual FoxPro to .NET — Without Rewriting From Scratch

Migrate your VFP / VFP9 application to modern .NET and C# with your business logic preserved, your DBF data moved to SQL Server or PostgreSQL, and every output validated against the legacy system before cutover.

Business logic preserved DBF data migrated Parallel-run validated Stack-neutral advice
Why .NET

Why convert a FoxPro application to .NET?

Microsoft ended extended support for Visual FoxPro in January 2015 — no patches, no compatibility fixes, no roadmap. For teams already invested in the Microsoft world, .NET (C#) is a natural destination: it shares FoxPro's Microsoft lineage, pairs cleanly with SQL Server, has an enormous developer talent pool, and is a mature, fast, open-source platform that will be well-supported for decades.

Converting to .NET lets you keep the business rules your company has refined over 20 years while shedding everything that makes VFP a liability — the security exposure of an unsupported runtime, Windows-desktop lock-in, the shrinking FoxPro talent pool, and the scalability ceiling of file-based DBF tables. The result is a browser-accessible, cloud-ready application built on a stack you can hire for.

One honest note: .NET is an excellent choice, but it isn't the only one. F8 Labs is stack-neutral — we also migrate to open-source stacks like Go, Node.js, and PostgreSQL. If you want to weigh that trade-off, read .NET vs. open source for FoxPro migration. This page covers the .NET path specifically.

The Process

How F8 Labs converts a Visual FoxPro app to .NET

A structured, low-risk migration powered by tooling built specifically for VFP — not a generic rewrite.

01

Free assessment

Our engineers analyze your VFP / VFP9 codebase, data model, forms, and reports. You receive a detailed scope, timeline, and risk breakdown — at no cost.

02

Business-logic mapping

Our VFP parser reads PRG, SCX, VCX, and FRX files and documents every rule, calculation, and workflow into a structured, language-neutral specification.

03

Data migration to SQL Server

DBF tables and their implicit relationships are migrated to a normalized SQL Server or PostgreSQL schema with full integrity checks and historical data preserved.

04

.NET / C# build

Using the logic map as the spec, we build your application on modern .NET — ASP.NET Core APIs and a web front end — with code generators accelerating the CRUD and API layers.

05

Parallel-run validation

The new .NET system runs alongside the legacy VFP app. Automated tests compare every output record by record until parity is confirmed and you're confident.

06

Cutover & support

We plan and rehearse the go-live, then provide post-migration support, training, and documentation. A partnership, not a handoff.

Scope

What gets converted — and what improves

Every part of the VFP application has a modern .NET equivalent — usually a better one.

interface

Forms & UI

VFP forms (SCX) become a modern .NET web UI — ASP.NET Core with React, Blazor, or Vue — accessible from desktop, tablet, and mobile.

reporting

Reports (FRX)

FoxPro reports become web-native dashboards, on-demand PDF generation, and Excel exports with role-based access and real-time data.

data

DBF tables

DBF / DBC storage migrates to SQL Server or PostgreSQL — ACID compliance, foreign keys, stored procedures, and enterprise backup.

security

Authentication

VFP password tables are replaced with OAuth2, Active Directory, or SSO, with MFA and audit logging for HIPAA / SOC 2 / PCI-DSS.

logic

Business logic

Validations, calculations, triggers, and workflows are re-implemented in clean, testable C# — mapped first, then verified against the original.

integration

Integrations

REST APIs, payment gateways, and cloud services become first-class — the modern integrations that are nearly impossible to bolt onto VFP.

Proof

A read-first modernization that ran 45× faster

For Pivoten's VFP9 AccountingManager, we exposed live DBF data through a modern API and rebuilt the reporting pipeline — a preview of the data layer that anchors a full .NET migration.

3,500
PDF reports in a single batch run
<1 min
A job that took 45+ minutes in FoxPro
45×
Faster — a 4,400%+ throughput gain
0
Disruptions to the live application
Timeline

How long does a VFP-to-.NET conversion take?

Timeline scales with the size and complexity of the application. The free assessment produces a precise, phase-by-phase schedule — these ranges are typical starting points:

Application sizeTypical timeline
Small — under 20 forms6–10 weeks. A focused departmental tool with a simple data model and limited reporting.
Medium — 20–100 forms3–5 months. Complex business rules, multiple roles, and custom reports.
Large — 100+ forms6–12 months. Enterprise systems with deep integrations and extensive legacy reporting, usually migrated in phases.

We almost always migrate in phases, starting with a low-risk read-only data layer so you see value early and carry confidence into each subsequent stage.

FAQ

Visual FoxPro to .NET — common questions

Will my business logic survive the conversion to .NET?
Yes. Before any C# is written, our VFP parser reads your PRG, SCX, VCX, and FRX files and documents every calculation, validation rule, and workflow as a structured specification. That spec becomes the blueprint for the .NET build, and a parallel-run validation phase compares every output of the new system against the legacy VFP application record by record before cutover.
Can you convert VFP9 specifically, not just older FoxPro?
Yes. We convert Visual FoxPro 9 (VFP9) as well as earlier VFP and FoxPro 2.x applications. VFP9-specific features — the report engine, the object model, parameterized views, SCX/VCX class libraries, and Rushmore-optimized data access — are all accounted for in the business-logic mapping phase.
Do you migrate the DBF data too, or just the code?
Both. We migrate your DBF tables and the relationships VFP enforced in code to a properly normalized SQL Server or PostgreSQL schema, with full integrity checks and historical data preserved. See our FoxPro DBF to SQL Server migration page for the data side in detail.
Will the new .NET application be web-based or desktop?
Most clients move to a web-based .NET application (ASP.NET Core with a React, Blazor, or Vue front end) so the system is accessible from any browser and any device. A desktop .NET client is also possible where a workflow genuinely requires it. The target architecture is chosen with you during the assessment.
How long does a VFP-to-.NET conversion take?
It depends on size and complexity. A focused departmental tool of 10–20 forms typically takes six to ten weeks; a mid-size app of 50–100 forms three to five months; a large enterprise system six to twelve months. The free assessment produces a detailed scope and timeline before any commitment.
Keep reading

Related guides

Ready to convert your FoxPro app to .NET?

Get a free assessment. We'll review your VFP application and return a scope, timeline, and plain-English recommendation — no obligation, no sales pressure.

Get a Free Migration Assessment