Error CS1061: 'HostBuilder' does not contain a definition for 'ConfigureFunctionsWebApplication'

Question

I have just created a new Azure Functions project with a Queue Trigger, straight out of the box using the following tech stack, and it doesn't build, and returns an error stating that " Error CS1061: 'HostBuilder' does not contain a definition for 'ConfigureFunctionsWebApplication'".

Tech Stack

• Visual Studio for Mac (17.6.8).
• .Net 7.0
• Azure Functions v4

Here is the code where the error occurs (straight out of the box Program.cs file)

using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.DependencyInjection;

var host = new HostBuilder()
    .ConfigureFunctionsWebApplication() //FAILING ON THIS LINE HERE!
    .ConfigureServices(services => {
        services.AddApplicationInsightsTelemetryWorkerService();
        services.ConfigureFunctionsApplicationInsights();
    })
    .Build();

host.Run();

Here is the QueueTrigger (straight out of the box):

using System;
using Azure.Storage.Queues.Models;
using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.Logging;

namespace AzureFunctionsDotNet7Example
{
    public class QueueTriggerFunctionExample
    {
        private readonly ILogger<QueueTriggerFunctionExample> _logger;

        public QueueTriggerFunctionExample(ILogger<QueueTriggerFunctionExample> logger)
        {
            _logger = logger;
        }

        [Function(nameof(QueueTriggerFunctionExample))]
        public void Run([QueueTrigger("myqueue-items", Connection = "connection-string-goes-here")] QueueMessage message)
        {
            _logger.LogInformation($"C# Queue trigger function processed: {message.MessageText}");
        }
    }
}

Here is the .csproj file for the project, for reference:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net7.0</TargetFramework>
    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
    <OutputType>Exe</OutputType>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>
  <ItemGroup>
    <FrameworkReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="1.21.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="1.16.4" />
    <PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.22.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.ApplicationInsights" Version="1.2.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Storage.Queues" Version="5.3.0" />
    <PackageReference Include="Microsoft.AspNetCore.Hosting" Version="2.2.7" />
  </ItemGroup>
  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="local.settings.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
    </None>
  </ItemGroup>
  <ItemGroup>
    <Using Include="System.Threading.ExecutionContext" Alias="ExecutionContext" />
  </ItemGroup>
</Project>

I came across this post here on StackOverflow, however this did not fix the issue (Installing NuGet Package Microsoft.AspNetCore.Hosting).

Any ideas on how to fix this? Help greatly appreciated. Many thanks.

UPDATE 1: Here is the repository on Github

UPDATE 2: Following on from the answered provided by Pravallika KV, I added all of the required missing NuGet Packages, which did indeed fix the build, but the application now fails with the following error:

"Failed to load /Users/Library/Application Support/VisualStudio/azure-functions-cli/Releases/4.67.0/cli_arm64/libhostpolicy.dylib, error: dlopen(/Users/Library/Application Support/VisualStudio/azure-functions-cli/Releases/4.67.0/cli_arm64/libhostpolicy.dylib, 0x0001): tried: '/Users/Library/Application Support/VisualStudio/azure-functions-cli/Releases/4.67.0/cli_arm64/libhostpolicy.dylib' (mach-o file, but is an incompatible architecture (have'arm64', need 'x86_64')), '/System/Volumes/Preboot/Cryptexes/OS/Users/Library/Application Support/VisualStudio/azure-functions-cli/Releases/4.67.0/cli_arm64/libhostpolicy.dylib' (no such file), '/Users/Library/Application Support/VisualStudio/azure-functions-cli/Releases/4.67.0/cli_arm64/libhostpolicy.dylib' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64')) An error occurred while loading required library libhostpolicy.dylib from [/Users/Library/Application Support/VisualStudio/azure-functions-cli/Releases/4.67.0/cli_arm64/]"

Answer 1

You need to install the missing NuGet packages.

• I have created a .NET 7 isolated Queue triggered Azure function.

.Csproj:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net7.0</TargetFramework>
    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
    <OutputType>Exe</OutputType>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>
  <ItemGroup>
    <FrameworkReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="Azure.Storage.Blobs" Version="12.13.1" />
    <PackageReference Include="Azure.Storage.Files.Shares" Version="12.1.0" />
    <PackageReference Include="Azure.Storage.Queues" Version="12.11.1" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="1.20.1" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.1.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="1.2.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Storage.Queues" Version="5.2.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="1.16.4" />
    <PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.21.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.ApplicationInsights" Version="1.1.0" />
    <PackageReference Include="Microsoft.Extensions.Azure" Version="1.5.0" />
  </ItemGroup>
  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="local.settings.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
    </None>
  </ItemGroup>
  <ItemGroup>
    <Using Include="System.Threading.ExecutionContext" Alias="ExecutionContext" />
  </ItemGroup>
</Project>

Function.cs:

using System;
using Azure.Storage.Queues.Models;
using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.Logging;
 
public class Function
 {
     private readonly ILogger<Function1> _logger;

     public Function1(ILogger<Function1> logger)
     {
         _logger = logger;
     }

     [Function(nameof(Function))]
     public void Run([QueueTrigger("myqueue-items", Connection = "demo")] QueueMessage message)
     {
         _logger.LogInformation($"C# Queue trigger function processed: {message.MessageText}");
     }
 }

Program.cs:

using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

var host = new HostBuilder()
    .ConfigureFunctionsWebApplication()
    .ConfigureServices(services =>
    {
        services.AddApplicationInsightsTelemetryWorkerService();
        services.ConfigureFunctionsApplicationInsights();
    })
    .Build();

host.Run();

local.settings.json:

{
    "IsEncrypted": false,
    "Values": {
        "AzureWebJobsStorage": "<storage_connection_string>",
        "FUNCTIONS_WORKER_RUNTIME": "dotnet-isolated"
    }
}

host.json:

{
    "version": "2.0",
    "logging": {
        "applicationInsights": {
            "samplingSettings": {
                "isEnabled": true,
                "excludedTypes": "Request"
            },
            "enableLiveMetricsFilters": true
        }
    }
}

Console Output:

[2024-02-07T15:43:01.514Z] Azure Functions .NET Worker (PID: 28100) initialized in debug mode. Waiting for debugger to attach...
[2024-02-07T15:43:01.738Z] Worker process started and initialized.

Functions:

        Function1: queueTrigger

For detailed output, run func with --verbose flag.
[2024-02-07T15:43:07.583Z] Host lock lease acquired by instance ID '000000000000000000000000F72731CC'.
[2024-02-07T15:43:08.845Z] Executing 'Functions.Function1' (Reason='New queue message detected on 'myqueue-items'.', Id=8be1eaf6-f837-44d1-ae01-42777355955e)
[2024-02-07T15:43:08.853Z] Trigger Details: MessageId: e0a9f004-ab4d-4ae7-a01a-a0c4c6c0040f, DequeueCount: 1, InsertedOn: 2024-02-07T15:43:08.000+00:00
[2024-02-07T15:43:09.233Z] C# Queue trigger function processed: Hello World
[2024-02-07T15:43:09.335Z] Executed 'Functions.Function1' (Succeeded, Id=8be1eaf6-f837-44d1-ae01-42777355955e, Duration=656ms)