I am not a developer but I needed to make some changes to an older C# program in Visual Studio. So, I made the change and when I went to build, it said this:
The reference assemblies for .NETFramework,Version=v4.0 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application.
So I did go and download the Developer Pack for 4.8 but Visual Studio is still not building it.
What is an easy way to fix this?
Thanks!
Brian
Yeah, VS2022 doesn’t support .NETFramework,Version=v4.0 out of the box. And finding and adding that support is kind of a trick. I think, though, that you should probably be able to just target framework 5.0, (nope editing, actually framework 4.8 for 2022) and build it just fine with no serious repercussions if it’s not an ancient codebase.
CraiGrrr:
Yeah, VS2022 doesn’t support .NETFramework,Version=v4.0 out of the box. And finding and adding that support is kind of a trick. I think, though, that you should probably be able to just target framework 5.0, (nope editing, actually framework 4.8 for 2022) and build it just fine with no serious repercussions if it’s not an ancient codebase.
Is this the proper way to set it?
<TargetFramework>net50</TargetFramework>
The reason I asked is that it didn’t work correctly.
Severity Code Description Project File Line Suppression State
Error CS1002 ; expected PSI-LOC \\fileserver\utility\Development\C#\Projects\LOC 2023\PSI-LOC\ConsoleApplication1\Program.cs 158 Active
Error CS1003 Syntax error, '(' expected PSI-LOC \\fileserver\utility\Development\C#\Projects\LOC 2023\PSI-LOC\ConsoleApplication1\Program.cs 158 Active
Error CS1026 ) expected PSI-LOC \\fileserver\utility\Development\C#\Projects\LOC 2023\PSI-LOC\ConsoleApplication1\Program.cs 158 Active
Error CS1525 Invalid expression term 'else' PSI-LOC \\fileserver\utility\Development\C#\Projects\LOC 2023\PSI-LOC\ConsoleApplication1\Program.cs 158 Active
Error CS8641 'else' cannot start a statement. PSI-LOC \\fileserver\utility\Development\C#\Projects\LOC 2023\PSI-LOC\ConsoleApplication1\Program.cs 158 Active
Error CS1003 Syntax error, 'switch' expected PSI-LOC \\fileserver\utility\Development\C#\Projects\LOC 2023\PSI-LOC\ConsoleApplication1\Program.cs 190 Active
Warning NETSDK1138 The target framework 'net50' is out of support and will not receive security updates in the future. Please refer to https://aka.ms/dotnet-core-support for more information about the support policy. PSI-LOC C:\Program Files\dotnet\sdk\7.0.302\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.EolTargetFrameworks.targets 28
Warning MSB3243 No way to resolve conflict between "System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" and "System.Core". Choosing "System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" arbitrarily. PSI-LOC C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin\amd64\Microsoft.Common.CurrentVersion.targets 2352
Warning MSB3243 No way to resolve conflict between "System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" and "System.Data". Choosing "System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" arbitrarily. PSI-LOC C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin\amd64\Microsoft.Common.CurrentVersion.targets 2352
Good morning.
To resolve this type of problem, assuming there is no more error, it would simply be in the project properties, in case the solution has only one project, or all projects that use the 4.0 framework and change to a higher version.
However, right when opening the solution, the Visual Studio already gives the option to do this before opening the projects. Then you choose the latest version and the project will be converted automatically. Save everything beforehand so in case anything goes wrong you have the original project.
Mike400:
The easiest way to do this is to change the target framework in the project configuration. Net4.0 is no longer supported by Microsoft.
So I did INSTALL OTHER FRAMEWORKS, it took me to a Microsoft site and I downloaded .net 7, installed it, rebooted and still cannot find it in the dropdown box for my project. Is there something I am doing wrong?
I tried the update-assistant in the command line and it converted it to .net 7 but still got some build errors…might be outside my paygrade to fix and a result of me changing the code but going to go through each one and see if I can fix.
