Azure Function v4 - Entry point not found in assembly Follow

Maziarka Radoslaw

Created November 15, 2022 21:16

Hello,

I encountered this error on two machines (the newest Rider installed):

.NET 6.0 downloaded and installed - https://dotnet.microsoft.com/en-us/download/dotnet/6.0
Azure Functions Core Tools downloaded and installed - https://learn.microsoft.com/en-us/azure/azure-functions/functions-run-local?tabs=v4%2Cwindows%2Ccsharp%2Cportal%2Cbash#install-the-azure-functions-core-tools
Azure Toolkit for Rider downloaded and installed - https://plugins.jetbrains.com/plugin/11220-azure-toolkit-for-rider
Created project based on Azure Functions template
Built and run project:

Unhandled exception. System.MissingMethodException: Entry point not found in assembly

I don't know whether to submit the issue to the tracker, or if it should be handled differently.

3 comments

Sofia Byzova

Created November 17, 2022 10:11

Hello,
Could you try to build and run your project from terminal with dotnet run command? Does it work?

Maziarka Radoslaw

Created November 17, 2022 10:24

It starts when I type

func start

But when I run

dotnet run

This is the .csproj that was generated by Rider

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.1.1" />
    <PackageReference Include="Stripe.net" Version="40.16.0" />
  </ItemGroup>
  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="local.settings.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
    </None>
  </ItemGroup>
</Project>

Maziarka Radoslaw

Created November 17, 2022 10:34

Ok, I found a problem.

Azure Functions v4 is run only as an Isolated Process:
https://techcommunity.microsoft.com/t5/apps-on-azure-blog/net-on-azure-functions-roadmap/ba-p/2197916

So we need to create for it a typical Program file:

https://github.com/manuelspinto/azure-function-example-csharp/blob/master/src/Program.cs

Probably yours Azure Function templates doesn't take it into consideration :)

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