Add Function App example with .NET 8 isolated model

examples/DotNetCore/AzureFunctions/AzureFunctions.sln

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

examples/DotNetCore/AzureFunctions/FunctionAppIsolated/FunctionAppIsolated.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
+    <OutputType>Exe</OutputType>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+  <ItemGroup>
+    <FrameworkReference Include="Microsoft.AspNetCore.App" />
+    <PackageReference Include="Azure.Identity" Version="1.13.2" />
+    <PackageReference Include="Microsoft.Azure.AppConfiguration.Functions.Worker" Version="8.1.1" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.0.0" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.3.0" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="2.0.1" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Storage.Queues" Version="5.5.0" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="2.0.1" />
+    <PackageReference Include="Microsoft.FeatureManagement" Version="4.0.0" />
+  </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>

examples/DotNetCore/AzureFunctions/FunctionAppIsolated/Program.cs

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

examples/DotNetCore/AzureFunctions/FunctionAppIsolated/ReadQueuedMessage.cs

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

examples/DotNetCore/AzureFunctions/FunctionAppIsolated/ShowBetaFeature.cs

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

examples/DotNetCore/AzureFunctions/FunctionAppIsolated/ShowMessage.cs

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

examples/DotNetCore/AzureFunctions/FunctionAppIsolated/host.json

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+{
+  "version": "2.0"
+}