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migrate-dotnet8-to-dotnet9

Migrate .NET 8 projects to .NET 9 with breaking change resolution.

Updated May 28, 2026
Search Tags:#CI/CD#migration#dotnet#upgradeframework#Breaking Changes
One-click install
npx skills add https://github.com/ojrojas/AgentsInstructions --skill migrate-dotnet8-to-dotnet9-ojrojas
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: migrate-dotnet8-to-dotnet9
Source: https://github.com/ojrojas/AgentsInstructions/tree/main/.claude/skills/dotnet-upgrade/skills/migrate-dotnet8-to-dotnet9
Command: npx skills add https://github.com/ojrojas/AgentsInstructions --skill migrate-dotnet8-to-dotnet9-ojrojas

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill migrates .NET 8 projects to .NET 9, addressing breaking changes and ensuring a smooth transition.

Core Features & Use Cases

  • Comprehensive Migration: Upgrades TargetFramework from net8.0 to net9.0 with resolution of breaking changes.
  • Automated Builds: Performs clean builds and tests to verify functionality post-migration.
  • Behavioral Adjustments: Adapts to runtime, ASP.NET Core, and EF Core behavioral changes in .NET 9.
  • Use Case: Ideal for developers who need to update .NET 8 projects for the latest .NET 9 features while maintaining compatibility and performance.

Quick Start

Run the migrate-dotnet8-to-dotnet9 skill on your .NET 8 project folder.

Frequently Asked Questions about migrate-dotnet8-to-dotnet9

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

FAQPage Schema
How do I migrate a .NET 8 project to .NET 9?▼

Migrating a .NET 8 project to .NET 9 involves upgrading the TargetFramework from net8.0 to net9.0 while resolving breaking changes. This Skill automates that process, performing clean builds and tests to verify post-migration functionality.

What breaking changes are resolved during a .NET 9 migration?▼

A .NET 9 migration resolves breaking changes by adapting to runtime, ASP.NET Core, and EF Core behavioral changes. This Skill comprehensively handles these framework adjustments to maintain compatibility and performance after the upgrade.

Do I need to provide build and test commands to upgrade my .NET framework?▼

Yes, you may need to provide build and test commands when upgrading your .NET framework. This Skill uses them to perform clean builds and run tests, ensuring complete build and test integrity after migrating from .NET 8 to .NET 9.

Can I automate builds and tests after updating TargetFramework to net9.0?▼

Yes, you can automate builds and tests after updating TargetFramework to net9.0. This Skill performs automated clean builds and test runs to verify functionality and adapt to runtime behavioral changes following the migration.

What's the best way to handle EF Core behavioral changes when upgrading to .NET 9?▼

Handling EF Core behavioral changes when upgrading to .NET 9 is managed by this Skill through automated behavioral adjustments. It ensures your Entity Framework Core implementation maintains compatibility with the new runtime framework changes.

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