Azure Function App won't run on Visual studio 2017 Requiring .NET Framework 4.7.1

Question

I had my Azure function running by yesterday but after updating windows to Version 17755.1 the app fails to run with n error requesting .NET Framework version 4.7.1 to be installed. I have counterchecked on my pc and actually the .NET Framework version 4.7.1 is installed. I tried to install the it from here but it won't install.

Answer 1

That build of Windows appears to have a general issue running any .NET app that targets 4.7.1.

Here is a workaround:

• Go to %LOCALAPPDATA%\\AzureFunctionsTools\\Releases\\[cliversion]\\cli
• Edit func.exe.Config

• Change the supportedRuntime tag to target 4.7.2 instead of 4.7.1

   <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />