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Add Function App example with .NET 8 isolated model (#1025)
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‎examples/DotNetCore/AzureFunctions/AzureFunctions.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.14.35828.13 main
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FunctionAppIsolated", "FunctionAppIsolated\FunctionAppIsolated.csproj", "{B24FEE1E-DDB8-E1CD-925F-199BF3D603C4}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{B24FEE1E-DDB8-E1CD-925F-199BF3D603C4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{B24FEE1E-DDB8-E1CD-925F-199BF3D603C4}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{B24FEE1E-DDB8-E1CD-925F-199BF3D603C4}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{B24FEE1E-DDB8-E1CD-925F-199BF3D603C4}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {DBF3FBCB-A4CD-41A8-BA2D-562B632F5BE7}
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EndGlobalSection
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EndGlobal

‎examples/DotNetCore/AzureFunctions/FunctionAppIsolated/FunctionAppIsolated.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net8.0</TargetFramework>
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<AzureFunctionsVersion>v4</AzureFunctionsVersion>
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<OutputType>Exe</OutputType>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<FrameworkReference Include="Microsoft.AspNetCore.App" />
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<PackageReference Include="Azure.Identity" Version="1.13.2" />
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<PackageReference Include="Microsoft.Azure.AppConfiguration.Functions.Worker" Version="8.1.1" />
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<PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.0.0" />
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<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.3.0" />
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<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="2.0.1" />
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<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Storage.Queues" Version="5.5.0" />
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<PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="2.0.1" />
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<PackageReference Include="Microsoft.FeatureManagement" Version="4.0.0" />
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</ItemGroup>
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<ItemGroup>
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<None Update="host.json">
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<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
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</None>
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<None Update="local.settings.json">
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<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
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<CopyToPublishDirectory>Never</CopyToPublishDirectory>
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</None>
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</ItemGroup>
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<ItemGroup>
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<Using Include="System.Threading.ExecutionContext" Alias="ExecutionContext" />
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</ItemGroup>
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</Project>

‎examples/DotNetCore/AzureFunctions/FunctionAppIsolated/Program.cs

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using Azure.Identity;
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using Microsoft.Azure.Functions.Worker.Builder;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Hosting;
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using Microsoft.FeatureManagement;
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var builder = FunctionsApplication.CreateBuilder(args);
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// Connect to Azure App Configuration
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builder.Configuration.AddAzureAppConfiguration(options =>
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{
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Uri endpoint = new(Environment.GetEnvironmentVariable("AZURE_APPCONFIG_ENDPOINT") ?? string.Empty);
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options.Connect(endpoint, new DefaultAzureCredential())
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// Load all keys that start with `TestApp:` and have no label
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.Select("TestApp:*")
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// Reload configuration if any selected key-values have changed.
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// Use the default refresh interval of 30 seconds. It can be overridden via AzureAppConfigurationRefreshOptions.SetRefreshInterval.
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.ConfigureRefresh(refreshOptions =>
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{
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refreshOptions.RegisterAll();
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})
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// Load all feature flags with no label. To load feature flags with specific keys and labels, set via FeatureFlagOptions.Select.
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// Use the default refresh interval of 30 seconds. It can be overridden via FeatureFlagOptions.SetRefreshInterval.
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.UseFeatureFlags();
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});
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// Add Azure App Configuration middleware and feature management to the service collection.
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builder.Services
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.AddAzureAppConfiguration()
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.AddFeatureManagement();
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// Use Azure App Configuration middleware for dynamic configuration and feature flag refresh.
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builder.UseAzureAppConfiguration();
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builder.ConfigureFunctionsWebApplication();
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builder.Build().Run();

‎examples/DotNetCore/AzureFunctions/FunctionAppIsolated/ReadQueuedMessage.cs

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using Azure.Storage.Queues.Models;
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using Microsoft.Azure.Functions.Worker;
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using Microsoft.Extensions.Logging;
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namespace FunctionAppIsolated
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{
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public class ReadQueuedMessage
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{
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private readonly ILogger<ReadQueuedMessage> _logger;
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public ReadQueuedMessage(ILogger<ReadQueuedMessage> logger)
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{
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_logger = logger;
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}
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// Queue triggered function with queue name defined in Azure App Configuration.
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// The queue name is stored with the key `TestApp:Storage:QueueName` in Azure App Configuration.
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// `AZURE_APPCONFIG_REFERENCE_QUEUENAME` is an app setting of the Function App referencing this key.
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// Learn more about App Configuration Reference:
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// https://learn.microsoft.com/azure/app-service/app-service-configuration-references
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[Function(nameof(ReadQueuedMessage))]
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public void Run([QueueTrigger(queueName: "%AZURE_APPCONFIG_REFERENCE_QUEUENAME%")] QueueMessage message)
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{
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_logger.LogInformation($"C# Queue trigger function processed: {message.MessageText}");
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}
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}
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}

‎examples/DotNetCore/AzureFunctions/FunctionAppIsolated/ShowBetaFeature.cs

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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Azure.Functions.Worker;
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using Microsoft.Extensions.Logging;
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using Microsoft.FeatureManagement;
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namespace FunctionAppIsolated
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{
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public class ShowBetaFeature
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{
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private readonly IVariantFeatureManagerSnapshot _featureManager;
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private readonly ILogger<ShowBetaFeature> _logger;
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public ShowBetaFeature(IVariantFeatureManagerSnapshot featureManager, ILogger<ShowBetaFeature> logger)
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{
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_featureManager = featureManager;
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_logger = logger;
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}
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[Function("ShowBetaFeature")]
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public async Task<IActionResult> Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post")] HttpRequest req)
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{
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_logger.LogInformation("C# HTTP trigger function processed a request.");
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// Read feature flag
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string featureName = "Beta";
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bool featureEnabled = await _featureManager.IsEnabledAsync(featureName);
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return new OkObjectResult(featureEnabled
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? $"{featureName} feature is On"
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: $"{featureName} feature is Off (or not found in Azure App Configuration).");
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}
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}
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}

‎examples/DotNetCore/AzureFunctions/FunctionAppIsolated/ShowMessage.cs

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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Azure.Functions.Worker;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Logging;
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namespace FunctionAppIsolated
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{
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public class ShowMessage
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{
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private readonly IConfiguration _configuration;
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private readonly ILogger<ShowMessage> _logger;
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public ShowMessage(IConfiguration configuration, ILogger<ShowMessage> logger)
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{
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_configuration = configuration;
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_logger = logger;
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}
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[Function("ShowMessage")]
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public IActionResult Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post")] HttpRequest req)
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{
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_logger.LogInformation("C# HTTP trigger function processed a request.");
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// Read configuration data
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string key = "TestApp:Settings:Message";
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string? message = _configuration[key];
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return new OkObjectResult(message ?? $"Please create a key-value with the key '{key}' in Azure App Configuration.");
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}
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}
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}

‎examples/DotNetCore/AzureFunctions/FunctionAppIsolated/host.json

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{
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"version": "2.0"
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}

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