I have an Azure pipeline setup for my builds. I have been running into this issue recently and cannot figure out a way to fix this:
##[error]C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(1220,5): Error MSB3644: The reference assemblies for .NETFramework,Version=v4.6.1 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks
About a week or so ago lots of our builds were failing, MS had changed something and we were getting this sort of thing:
[error]C:\Users\VssAdministrator\.nuget\packages\codegeneration.roslyn.buildtime\0.6.1\build\CodeGeneration.Roslyn.BuildTime.targets(73,5): Error CGR1001: CodeGeneration.Roslyn.Tool (dotnet-codegen) is not available, code generation won't run. Please check https://github.com/AArnott/CodeGeneration.Roslyn for usage instructions.
However was able to solve this by explicitily adding a task to include the netcore2.1 sdk
- task: UseDotNet@2
inputs:
packageType: 'sdk'
version: '2.x'
Now this issues is fixed we are now posed with the error complaining it cannot find .NET Framework 4.6.1.
Anyways any idea whats going on, this is driving me banannas - any advice or insight greatly appreciated.
The .Net framework version 4.6.1 has been deprecated by Azure DevOps Microsoft-hosted agent. For now, there are two kinds of Microsoft-hosted agents:
windows-2019 OR windows-latest: .Net framework version 4.7.2 and 4.8 preinstalled. This is documented here.
windows-2022: .Net framework version 4.8 preinstalled. This is documented here.
That is, you need to use self-hosted agent to use .Net framework 4.6.1 in the pipeline.