Every premium and members-only resource for $9.99/month, as a no-commitment subscription. See the plans

PalateKit

Sign in
Menu

Request a resource

Describe the resource you are missing in one sentence. We will email you when it is published.

0 / 280

A page, a video or an image online.

Unlock PalateKit

Unlock everything

Plan

Paying means accepting our terms of sale.

Secure payment by Stripe. Receipts and invoices sent by email.

Welcome back

Sign in to install, download or save this resource. A free account is enough for free resources.

Migrate a project from .NET 8 to .NET 9 v1.0.0

Use this resource to migrate a .NET 8 project to .NET 9 and fix breaking changes

New

  • 411 downloads
  • 147 likes
  • 125 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install dotnet-8-to-9-migration

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent assesses the project, changes the TargetFramework, fixes compilation errors and behavior changes, then updates the infrastructure. It relies on per-domain references and verifies the result.

Mostly picked by

Updated November 2, 2026

Card for the “Migrate a project from .NET 8 to .NET 9” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

Similar resources

View all

What you get

  • SKILL.md: migration steps and behavior change handling
  • references/: guides for ASP.NET Core, EF Core, cryptography, networking, WinForms and others

Good fit for

  • Your API must move to net9.0
  • Code uses BinaryFormatter and must be replaced

Not for

    Tags

    • migration
    • .net 9
    • asp.net core
    • ef core

    About

    You say

    “Migrate this ASP.NET Core project from net8.0 to net9.0 and fix the build errors.”

    Card for the “Migrate a project from .NET 8 to .NET 9” skill

    Skill published by dotnet under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to migrate a .NET 8 project to .NET 9 and fix breaking changes
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/aspnet-core-dotnet8to9.md2.3 KB
    • references/containers-interop-dotnet8to9.md1.9 KB
    • references/core-libraries-dotnet8to9.md7 KB
    • references/cryptography-dotnet8to9.md2.1 KB
    • references/csharp-compiler-dotnet8to9.md3.3 KB
    • references/deployment-runtime-dotnet8to9.md2.4 KB
    • references/efcore-dotnet8to9.md6.9 KB
    • references/sdk-msbuild-dotnet8to9.md2.3 KB
    • references/serialization-networking-dotnet8to9.md5.4 KB
    • references/winforms-wpf-dotnet8to9.md3.7 KB
    • SKILL.md15.4 KB

    Origin and licence

    Listed unmodified

    Author
    dotnet
    Source
    github.com/dotnet/skills/tree/586f13f8d898a60583a3364f146a3b6f5a763164/plugins/dotnet-upgrade/skills/migrate-dotnet8-to-dotnet9
    Licence
    MIT

    Notice

    « migrate-dotnet8-to-dotnet9 » (dotnet, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

    User reviews

    –

    No ratings yet

    Loading reviews…

    Delete your review?

    Your rating and comment will be removed from the page.