I face an issue with Visual Studio 2022 when I try to target multiple frameworks with the TAG: "multi target" frameworks.
In my .csproj, I change the value for
<TargetFrameworks>net5.0;net45</TargetFrameworks>
and I always get a compilation error.
I try to just add the net45 in the value, but I still get the error.
<TargetFrameworks>net45</TargetFrameworks>
If I let the old value (targeting only one framework)
<TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
everything works fine and I am able to build my project.
When I use <TargetFrameworks/>, it looks like the compiler tries to use the .NET framework 4.0 to build and not find some reference that was introduced in the 4.5 framework.
CS0117 Task do not contain a definition for 'FromResult'
Any idea what's going on ?