The code has broken after upgrading to .NET 8 about issues

[robmen]

Duplicate of #7932

[Praveer1981]

can somebody guide me how to move forward ?

[dcm99]

Hello,
There is a wip that addresses this feature. Currently you are limited to .Net Framework up to version 4.7.2.

[Praveer1981]

Hello, There is a wip that addresses this feature. Currently you are limited to .Net Framework up to version 4.7.2.

@dcm99 Thanks for the info.

[wmanning]

@Praveer1981 Why can't you revert your custom action project back to .net framework?
Do you have other projects in the solution maybe as .net 8 and you can't mix them? Trying to think of a valid reason.

Can you confirm you are using Wix 3.x?

[Praveer1981]

@Praveer1981 Why can't you revert your custom action project back to .net framework? Do you have other projects in the solution maybe as .net 8 and you can't mix them? Trying to think of a valid reason.

Can you confirm you are using Wix 3.x?

@wmanning Thanks a lot for your response. We are in the middle of moving our project from .net framework to .NET 8. We use VS2022 and using Wixtoolset 3.11 plugin. Infact I also tried using heatmap.

I am not quite sure wheter we can mix up them up. looking for your advice.

[wmanning]

If your custom action project doesn't reference anything from your .net 8 projects I don't see any reason not to mix them in the same solution. I could be missing something though.

.net uses the newer SDK-style csproj format where .net framework uses old csproj style.
https://learn.microsoft.com/en-us/dotnet/core/project-sdk/overview

I had .net framework 4.0 projects that I converted to SDK-style csproj format with no issues. This is what I had to do: https://stackoverflow.com/a/75316507/623561. I converted them before I moved to Wix 4 as Wix 4 uses the new SDK-style csproj format. I not sure if I needed to but it is much cleaner.

[Praveer1981]

@wmanning In my case, since we are upgrading all of our project to .NET 8 , my custom action project has dependency on the libraries that are built on .NET8

[dcm99]

A bennefit from the new SDK Style project format is that you can now very easy multitarget your projects.
You can switch <TargetFramework>net8.0-windows</TargetFramework> to <TargetFrameworks>net472;net8.0-windows</TargetFrameworks> in the csproj file from the shared dependency.
If you are using ".net 8 only" stuff in your library, things getting a bit more complicated. But if you are only using newer c# language features, setting <LangVersion>latest</LangVersion> is often enough.