Update TFM value with upgrade-assistant command

Question

While migrating MVC (.net framework 4.8) application to .Net 5, the step three (Update TFM) in upgrade-assistant flow, it always updating my project to 'netStandard2.0' instead of '.net5'. How can I point this to use .net5?

Thank you.

Answer 1

Hi @Sanjay Mishra ,
First familiarize yourself with the entire upgrade process to determine the feasibility of the upgrade. Once done, you can install the .NET Upgrade Assistant and start upgrading your projects to the latest version of .NET.

Updating the TFM is done by changing the target framework moniker (TFM) used in the project <TargetFramework> attribute to retarget to the latest version of .NET.

I suggest you take a look at the relevant documentation, which provides detailed steps and explanations.
https://devblogs.microsoft.com/dotnet/introducing-the-net-upgrade-assistant-preview
Upgrade an ASP.NET MVC app to .NET 6 with the .NET Upgrade Assistant
https://github.com/dotnet/upgrade-assistant#troubleshooting-common-issues
https://learn.microsoft.com/en-us/answers/questions/669564/upgrading-from-net-framework-452-to-net-standard-2.html
Best regards,
Lan Huang

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Answer 2

the default for class libraries is .net standard 2.0 (C# 7) which makes them compatible with 4.8 and core. in VS or in the project file you can just update to a later .net core/standard version, and get additional api's and c# language features.

note: as .net 5 support ends in May, you should skip 5..0, and upgrade to .net 6.0 LTS (requires VS 2022 or visual studio code)