Project does not reference framework except that it does

Question

I have a solution which contains multiple projects. All projects target v4.6.1 of the .NETFramework. However when I build my solution and try to run it I get the following exception:

Your project does not reference ".NETFramework,Version=v4.6.1" framework. Add a reference to ".NETFramework,Version=v4.6.1" in the "TargetFrameworks" property of your project file and then re-run NuGet restore.

Can anyone point me in the correct direction? I don't see what is going wrong.

Config1:

<RootNamespace>Exact_Online_Database</RootNamespace>
<AssemblyName>Exact_Online_Database</AssemblyName>
<TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>

Config2:

<RootNamespace>ExactOnlineConsoleApp</RootNamespace>
<AssemblyName>ExactOnlineConsoleApp</AssemblyName>
<TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>

Config3:

<RootNamespace>Exact_Online_Services</RootNamespace>
<AssemblyName>Exact Online Services</AssemblyName>
<TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>

Config4:

<RootNamespace>Example</RootNamespace>
<AssemblyName>Example</AssemblyName>
<TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>

Did you upgrade from on older version? seems like some file points to an old framework version and thus produces the error. — Aaron
@Aaron I didn't upgrade, I checked my files and as far as I can see, they are all correct — Bart Schelkens
Hm seems strange to me. Could you try to switch the framework version maybe to 4.7.2 or any other version and then try building the project? For me it just works when I switch the version in properties. — Aaron

Rob Willis Rob Willis · Accepted Answer · 2019-09-27T14:13:56

Deleting the obj folder resolved this issue for me as recommended in Henry He's answer to this question.

For info I came across this issue when I tried to build a project that had been changed to .NET Core (from Framework) on a different branch. When I switched back to a branch with the original framework project it would no longer build.

Project does not reference framework except that it does

2 Answers