Azure Functions 4.x Early Preview

https://github.com/Azure/Azure-Functions/wiki/V4-early-preview

• Install the latest Azure Functions Tools

npm i -g azure-functions-core-tools@4 --unsafe-perm true

This will install func.exe in %AppData%\npm\node_modules\azure-functions-core-tools\bin\func.exe.

This might suffice for using Visual Studio code, but when you try to launch or debug your Function from Visual Studio, it will try to find the latest version of the tools for 3.x

Close down all instances of Visual Studio Delete the %UserProfile%\.templateengine directory.