Visual Studio 2017 - Could not load file or assembly 'System.Runtime, Version=4.1.0.0' or one of its dependencies

Question

I am using Visual Studio 2017 and am trying to create a .Net Standard 1.5 library and use it in a .Net 4.6.2 nUnit test project.

I am getting the following error...

Answer 1

I had this error occur when building an Azure Function (with a queue trigger, should it make a difference)

The issue in this case was because the AzureFunctionsVersion was set to v2 instead of v3. To update it via VS2019, unload the project then edit the csproj file. Within the PropertyGroup node, add/edit the following:

  v3