Frame work error

Question

Frame work error

tarun k 555

I am using VS build task but failing with following error

##[error]C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(1259,5): 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
##[debug]Processed: ##vso[task.logissue type=Error;sourcepath=C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets;linenumber=1259;columnnumber=5;code=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
Project "C:\azp\agent\_work\3\s\VeracodeDemo.sln" (1) is building "C:\azp\agent\_work\3\s\VeracodeDemo\VeracodeDemo.csproj" (2) on node 1 (default targets).

But respective machine alrready configured with below dotent frame work versions

User's image

What is missing? Please suggest fix

1 answer

Your answer

Answer 1

Adiba Khan 245 Microsoft External Staff

You are encountering a build error in Azure Devops due to missing .Net framework 4.6.1 developer pack.

from the logs:

The reference assemblies for .NETFramework,Version=v4.6.1 were not found.

This means the .Net framework 4.6.1 targeting pack is not installed on the build agent

Your script doesn’t fix because in your current install command you are including 4.5.2 but your project requires 4.6.1.

Solution:

Add the missing 4.6.1 developer pack component to your visual studio installation script

Update your install command with:

--add Microsoft.Net.Component.4.6.1.TargetingPack

So, your corrected block should include:

--add Microsoft.Net.Component.4.6.1.TargetingPack

In case you want to install it manually:

.NET - Build modern apps and powerful cloud services

tarun k 555

Hi Adiba Kha,

I tried with command you gave but now i am seeing following error

C:\azp\agent\_work\1\s\packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.2.0.0\build\net46\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.props(31,5): error MSB4036: The "CheckIfVBCSCompilerWillOverride" task was not found. Check the following: 1.) The name of the task in the project file is the same as the name of the task class. 2.) The task class is "public" and implements the Microsoft.Build.Framework.ITask interface. 3.) The task is correctly declared with <UsingTask> in the project file, or in the *.tasks files located in the "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin" directory. [C:\azp\agent\_work\1\s\VeracodeDemo\VeracodeDemo.csproj]
##[debug]Processed: ##vso[task.logdetail id=8f701b39-6cb9-4e12-8b41-179e91715cd9;parentid=3d16778a-07b6-4a76-b818-dc3086dff86d;type=Build;result=Failed;finishtime=2025-08-01T10:21:10.2522078Z;progress=100;state=Completed;parentid=3d16778a-07b6-4a76-b818-dc3086dff86d;name=;]
Done Building Project "C:\azp\agent\_work\1\s\VeracodeDemo\VeracodeDemo.csproj" (default targets) -- FAILED.
##[debug]Processed: ##vso[task.logdetail id=d146da3d-0caf-4b80-8ea1-0b988036bf11;parentid=3d16778a-07b6-4a76-b818-dc3086dff86d;name=VeracodeDemo.Tests\VeracodeDemo.Tests.csproj;type=Build;starttime=2025-08-01T10:21:10.2972126Z;state=InProgress;]
Project "C:\azp\agent\_work\1\s\VeracodeDemo.sln" (1) is building "C:\azp\agent\_work\1\s\VeracodeDemo.Tests\VeracodeDemo.Tests.csproj" (3) on node 1 (default targets).
PrepareForBuild:
  Creating directory "bin\Release\".
  Creating directory "obj\Release\".
##[debug]Processed: ##vso[task.logdetail id=6afedab2-4d9f-4061-b336-9ca73f6f8764;parentid=d146da3d-0caf-4b80-8ea1-0b988036bf11;name=VeracodeDemo\VeracodeDemo.csproj (GetTargetFrameworks);type=Build;starttime=2025-08-01T10:21:10.3160353Z;state=InProgress;targetname=GetTargetFrameworks;]
##[debug]Processed: ##vso[task.logdetail id=6afedab2-4d9f-4061-b336-9ca73f6f8764;parentid=d146da3d-0caf-4b80-8ea1-0b988036bf11;type=Build;result=Failed;finishtime=2025-08-01T10:21:10.3240327Z;progress=100;state=Completed;parentid=d146da3d-0caf-4b80-8ea1-0b988036bf11;name=;]
##[debug]Processed: ##vso[task.logdetail id=d146da3d-0caf-4b80-8ea1-0b988036bf11;parentid=3d16778a-07b6-4a76-b818-dc3086dff86d;type=Build;result=Failed;finishtime=2025-08-01T10:21:10.4665575Z;progress=100;state=Completed;parentid=3d16778a-07b6-4a76-b818-dc3086dff86d;name=;]
Done Building Project "C:\azp\agent\_work\1\s\VeracodeDemo.Tests\VeracodeDemo.Tests.csproj" (default targets) -- FAILED.
##[debug]Processed: ##vso[task.logdetail id=a0609238-e09f-4eb6-8a03-5d98c3a02aa3;parentid=3d16778a-07b6-4a76-b818-dc3086dff86d;name=VeracodeDemoDatabase\VeracodeDemoDatabase.sqlproj;type=Build;starttime=2025-08-01T10:21:10.5185443Z;state=InProgress;]
##[error]C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(1259,5): Error MSB3644: The reference assemblies for .NETFramework,Version=v4.5 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
##[debug]Processed: ##vso[task.logissue type=Error;sourcepath=C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets;linenumber=1259;columnnumber=5;code=MSB3644;]The reference assemblies for .NETFramework,Version=v4.5 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
Project "C:\azp\agent\_work\1\s\VeracodeDemo.sln" (1) is building "C:\azp\agent\_work\1\s\VeracodeDemoDatabase\VeracodeDemoDatabase.sqlproj" (4) on node 1 (default targets).
C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(1259,5): error MSB3644: The reference assemblies for .NETFramework,Version=v4.5 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 [C:\azp\agent\_work\1\s\VeracodeDemoDatabase\VeracodeDemoDatabase.sqlproj]
_CleanRecordFileWrites:
  Creating directory "obj\Release\".
##[debug]Processed: ##vso[task.logdetail id=a0609238-e09f-4eb6-8a03-5d98c3a02aa3;parentid=3d16778a-07b6-4a76-b818-dc3086dff86d;type=Build;result=Failed;finishtime=2025-08-01T10:21:10.5255448Z;progress=100;state=Completed;parentid=3d16778a-07b6-4a76-b818-dc3086dff86d;name=;]
Done Building Project "C:\azp\agent\_work\1\s\VeracodeDemoDatabase\VeracodeDemoDatabase.sqlproj" (default targets) -- FAILED.
##[debug]Processed: ##vso[task.logdetail id=3d16778a-07b6-4a76-b818-dc3086dff86d;parentid=a134b44e-5703-4f20-b2a5-b85b20c3fa3c;type=Build;result=Failed;finishtime=2025-08-01T10:21:10.5275445Z;progress=100;state=Completed;parentid=a134b44e-5703-4f20-b2a5-b85b20c3fa3c;name=;]
Done Building Project "C:\azp\agent\_work\1\s\VeracodeDemo.sln" (default targets) -- FAILED.

Build FAILED.

"C:\azp\agent\_work\1\s\VeracodeDemo.sln" (default target) (1) ->
"C:\azp\agent\_work\1\s\VeracodeDemo\VeracodeDemo.csproj" (default target) (2) ->

Adiba Khan 245 Reputation points Microsoft External Staff

2025-08-01T11:23:04.8266667+00:00

the error is

error MSB3644: The reference assemblies for .NETFramework,Version=v4.5 were not found.

Please confirm if the v4.5 exists or not using the following directory and respond back:

C:\Program files (x86)\Reference Assemblies\Microsoft\Framework.NetFramework\v4.5
tarun k 555 Reputation points

2025-08-01T11:32:42.9466667+00:00

Hi Adiba Khan,

this is what i see

PS C:\azp> Test-Path "C:\Program files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5"

True

PS C:\azp>
Adiba Khan 245 Reputation points Microsoft External Staff

2025-08-04T10:04:35.6833333+00:00

The first error you are getting usually indicates:

·         A missing or incompatible MS build ot .Net SDK/Targeting Pack.

·         Or corrupt project/task files

The second error v4.5 and v4.5.1 is missing but as per your check it is available.

One thing you can do is, include all the frameworks used by any project or subproject. Based on the logs, including the following:

--add Microsoft.Net.Component.4.5.TargetingPack ‘

--add Microsoft.Net.Component.4.5.1.TargetingPack ‘

--add Microsoft.Net.Component.4.6.1.TargetingPack ‘

Some additional checks that you must do:-

·         Clean build agent: Ensure no corrupt NuGet caches or half-installed SDKs.

·         Ensure latest VS build tools installed (especially for .sqlproj, which may need data workload)

·         For VB/C# task errors: Make sure Microsoft.Net.Compilers NuGet package is properly referenced if your project uses Roslyn manually.
Adiba Khan 245 Reputation points Microsoft External Staff

2025-08-08T10:09:08.7133333+00:00

Hope you are doing well; this is a follow up call. please let me know if the issue is resolved or not. If issue is resolved, please mark the thread as answered
Adiba Khan 245 Reputation points Microsoft External Staff

2025-08-12T10:11:35.6966667+00:00

Hope you are doing well; this is a follow up call. please let me know if the issue is resolved or not. If issue is resolved, please mark the thread as answered

Share via

Frame work error

1 answer

Your answer