migrating-dotnet

Migrate legacy .NET Framework apps to modern .NET with stepwise validation.

3|Updated Jan 22, 2026

Search Tags:#testing #migration #branching #dotnet #upgrade #sdk-style #net6-10

Ready to run

npx skills add https://github.com/falconnt/windsurf-skills --skill migrating-dotnet

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: migrating-dotnet
Source: https://github.com/falconnt/windsurf-skills/tree/main/migrating-dotnet
Command: npx skills add https://github.com/falconnt/windsurf-skills --skill migrating-dotnet

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Upgrading legacy .NET Framework apps to modern .NET introduces risk and complexity. This Skill provides a structured, stepwise approach to perform safe migrations while preserving behavior and enabling modern tooling.

Core Features & Use Cases

Stepwise migration guidance: one focused change at a time to keep builds green.
Branching strategy and validation: create a dedicated migration branch, verify builds and tests after each step.
Prerequisites and configuration guidance: convert to SDK-style csproj, enable Central Package Management, migrate packages.config to PackageReference.
Use Case: upgrading a large solution from .NET Framework 4.x to .NET 6/8/10 with a phased, test-driven approach.

Quick Start

Create a migration branch for your solution.
Convert projects to SDK-style csproj and set up Central Package Management.
Migrate packages.config to PackageReference and verify the build and tests after each step.
Run the guided migration to move from .NET Framework to modern .NET versions in phases.

Frequently Asked Questions about migrating-dotnet

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I safely migrate legacy .NET Framework apps to modern .NET versions?▼

To migrate legacy .NET Framework apps safely, create a dedicated migration branch, convert projects to SDK-style csproj, enable central package management, and validate builds and tests after each stepwise change.

What is the best way to upgrade a large .NET solution from .NET Framework 4.x to .NET 8?▼

The best way to upgrade a large .NET solution is a phased, test-driven approach: migrate packages.config to PackageReference first, convert to SDK-style, then move to modern .NET versions while verifying tests continuously.

Can I migrate packages.config to PackageReference during a .NET upgrade?▼

Yes, you can migrate packages.config to PackageReference during a .NET upgrade. The migration process enables Central Package Management and requires verifying that your build and tests pass after completing this specific transition.

Do I need to convert to SDK-style csproj before upgrading to .NET 6 or .NET 10?▼

Yes, converting to SDK-style csproj is a prerequisite before upgrading to .NET 6 or .NET 10. It enables modern tooling and allows you to safely configure Central Package Management for the migration.

Why should I create a dedicated migration branch for .NET Framework upgrades?▼

You should create a dedicated migration branch for .NET Framework upgrades to isolate risk and preserve existing behavior. This branching strategy ensures builds stay green while you apply stepwise project modernization changes.