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[FunctionName("SbusQueueTriggerFunction")]
public async Task RunAsync(
    [ServiceBusTrigger("%QueueName%", Connection = "SbusConnectionString")]
    Message message,
    MessageReceiver messageReceiver,
    ILogger log)
{
    // ...
    
    // dead-letter the msg

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using Microsoft.Azure.KeyVault.Models;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Configuration.AzureKeyVault;

namespace Demo.Azure.KeyVault
{
    public class PrefixKeyVaultSecretManager : IKeyVaultSecretManager
    {
        private readonly string _prefix;

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configurationBuilder.AddAzureKeyVault(new AzureKeyVaultConfigurationOptions
{
    Vault = configuration["KeyVaultUrl"],
    ReloadInterval = TimeSpan.FromMinutes(10),
    Client = new KeyVaultClient(new KeyVaultClient.AuthenticationCallback(
       new AzureServiceTokenProvider().KeyVaultTokenCallback))
});

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public static class ServiceExtensions
{
    public static IServiceCollection AddTypedHttpClient(this IServiceCollection service, IConfiguration configuration)
    {
        service.Configure<HttpClientConfiguration>(
            configuration.GetSection(nameof(HttpClientConfiguration)));

        var provider = service.BuildServiceProvider();
        var httpConfiguration = provider.GetService<IOptions<HttpClientConfiguration>>().Value;

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Prerequisite

Install https://github.com/Microsoft/artifacts-credprovider

Project setup

Add a nuget.config file to your project, in the same folder as your .csproj or .sln file. E.g.:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <packageSources>
 

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#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

# -e: immediately exit if any command has a non-zero exit status
# -o: prevents errors in a pipeline from being masked
# IFS new value is less likely to cause confusing bugs when looping arrays or arguments (e.g. $@)

function usage()
{

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# Set other app settings
$values = [System.IO.File]::ReadAllText($appSettings)
$appSettingsList = $values.Split([System.Environment]::NewLine)

echo "setting app settings: $appSettingsList"
az functionapp config appsettings set `
    --name $functionAppName `
    --resource-group $resourceGroup `
    --settings $appSettingsList

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builder.Services.Configure(delegate(ServiceBusOptions options)
{
    options.MessageHandlerOptions.AutoComplete = false;
});

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# check to see if secret exists in keyvault, otherwise throw error
$SecretName = "HttpClientConfiguration--ApiKey"
$doesExist=$(az keyvault secret show `
    --vault-name $KeyVaultName `
    --name $SecretName `
    --query id -o tsv)
if ($doesExist) {
    echo "Secret '$SecretName' found in vault '$KeyVaultName' OK"
} else {
    echo "Expecting secret '$SecretName' to be in vault '$KeyVaultName'"

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  public static class ServiceExtensions
  {
      /// <summary>
      /// Creates a custom configuration for easier development of Azure Functions.
      /// When environment is not Development, it adds support for keyvault
      /// </summary>
      /// <param name="builder"></param>
      /// <returns></returns>
      public static IConfiguration GetCustomConfiguration(this IFunctionsHostBuilder builder)
      {