How to convert Umbraco website 13 to 17

Important Note :-

• Umbraco 17 run required Visual Studio 2026 because .NET 10 only support in Visual Studio 2026 that reason is required.

Step 1: Update target framework

• Highlight part in target framework in select .NET 10.0.
• Rebuild the solution.

Step 2: Update Umbraco CMS version

• Please open Nuget – Solution and update Umbraco version 17.0.0 as per below image highlight wise.
• Rebuild the solution.

Step 3: Error Solution

• After rebuild the solution getting below error in Program.cs class and remove highlight line in code.
• Rebuild the solution.

• After rebuild again show error in Umbraco auto generate model because Umbraco 17 in some model access property are changed so please delete this model folder and run the project with error.

• After run successfully open setting and click on “Model Builder” then show below image window click button of “Generate Models” then create model as per new property wise.
• Rebuild solution error has been resolved.

Step 4: Run the website

• My website is run successfully and completely convert 13 to 17 and everything is working fine.

Written by

Nishant Vaghasiya

Technical Architect

I'm Nishant Vaghasiya, a Technical Architect and Umbraco & Sitecore Certified Developer at Arroact Technologies. I specialise in building digital solutions with Umbraco and Sitecore that are practical, scalable, and built to last.

Over the years, I've learned that the best solutions aren't always the most complex ones, they're the ones that make a team's day-to-day work simpler and give them confidence that the system won't let them down.

That's what drives me writing code that performs well, stays reliable, and continues to create real impact long after it goes live.