Getting "Metadata generation failed" when building C# function app in Visual Studio 2019

Question

Starting with a C# function app created as a new project in VS2019 (16.4.1) and latest Azure libraries (Azure Functions and Web Jobs Tools 16.4.457.38025) from VS Installer, it fails to build every time.

C:\Users\myname\.nuget\packages\microsoft.net.sdk.functions\1.0.29\build\netstandard1.0\Microsoft.NET.Sdk.Functions.Build.targets(41,5): error : Metadata generation failed.

Has anyone else been able to get this to work ?

Answer 1

To solve this issue, upgraded Microsoft.NET.Sdk.Functions to last version(3.0.1).And delete the netstandard1.0 folder:

"C:\Users\myname\.nuget\packages\microsoft.net.sdk.functions\1.0.29\build\netstandard1.0

Answer 2

This error started occurring for me when I upgraded the "Microsoft.NET.Sdk.Functions" to 4.0.0 or above (unfortunately). Staying with 3.0.13 allows it to compile without error.