Add Entra ID tab

Author: maud-lv

articles/azure-app-configuration/enable-dynamic-configuration-dotnet.md

@@ -7,7 +7,7 @@ ms.service: azure-app-configuration
 ms.devlang: csharp
 ms.custom: devx-track-csharp, devx-track-dotnet
 ms.topic: tutorial
-ms.date: 03/07/2024
+ms.date: 03/06/2025
 ms.author: malev
 #Customer intent: I want to dynamically update my .NET Framework app to use the latest configuration data in App Configuration.
 ---
@@ -63,9 +63,50 @@ Add the following key-value to the App Configuration store and leave **Label** a
     private static IConfigurationRefresher _refresher;
     ```
 
-1. Update the `Main` method to connect to App Configuration with the specified refresh options.
+1. Update the `Main` method to connect to App Configuration with the specified refresh options. Connect to App Configuration using Microsoft Entra ID (recommended), or a connection string.
 
+
+    ### [Microsoft Entra ID (recommended)](#tab/entra-id)
+
+    You use the `DefaultAzureCredential` to authenticate to your App Configuration store. Follow the [instructions](./concept-enable-rbac.md#authentication-with-token-credentials) to assign your credential the **App Configuration Data Reader role**. Be sure to allow sufficient time for the permission to propagate before running your application.
+ 
     ```csharp
+    // Existing code in Program.cs
+    // ... ...
+    
+    static void Main(string[] args)
+    {
+        var builder = new ConfigurationBuilder();
+        builder.AddAzureAppConfiguration(options =>
+        {
+        string endpoint = Environment.GetEnvironmentVariable("Endpoint"); 
+        options.Connect(new Uri(endpoint), new DefaultAzureCredential());
+            // Load all keys that start with `TestApp:`.
+            .Select("TestApp:*")
+                  // Configure to reload the key 'TestApp:Settings:Message' if it is modified.
+                    .ConfigureRefresh(refresh =>
+                    {
+                        refresh.Register("TestApp:Settings:Message")
+                               .SetCacheExpiration(TimeSpan.FromSeconds(10));
+                    });
+
+            _refresher = options.GetRefresher();
+        });
+
+        _configuration = builder.Build();
+        PrintMessage().Wait();
+    }
+    
+    // The rest of existing code in Program.cs
+    // ... ...
+    ```
+ 
+    ### [Connection string](#tab/connection-string)
+ 
+    ```csharp
+    // Existing code in Program.cs
+    // ... ...
+
     static void Main(string[] args)
     {
         var builder = new ConfigurationBuilder();
@@ -110,7 +151,33 @@ Add the following key-value to the App Configuration store and leave **Label** a
 
 ## Build and run the app locally
 
-1. Set an environment variable named **ConnectionString** to the read-only key connection string obtained during your App Configuration store creation. 
+1. Set an environment variable.
+
+    ### [Microsoft Entra ID (recommended)](#tab/entra-id)
+
+    Set an environment variable named `Endpoint` to the endpoint of your App Configuration store found under the **Overview** of your store in the Azure portal.
+
+    If you use the Windows command prompt, run the following command and restart the command prompt to allow the change to take effect:
+
+    ```cmd
+    setx Endpoint "<endpoint-of-your-app-configuration-store>"
+    ```
+
+    If you use PowerShell, run the following command:
+
+    ```powershell
+    $Env:Endpoint = "<endpoint-of-your-app-configuration-store>"
+    ```
+
+    If you use macOS or Linux, run the following command:
+
+    ```bash
+    export Endpoint='<endpoint-of-your-app-configuration-store>'
+    ```
+
+    ### [Connection string](#tab/connection-string)
+
+    Set an environment variable named `ConnectionString` to the read-only key connection string found under **Access keys** of your store in the Azure portal.
 
     If you use the Windows command prompt, run the following command:
     ```console
@@ -122,6 +189,13 @@ Add the following key-value to the App Configuration store and leave **Label** a
     $Env:ConnectionString = "<connection-string-of-your-app-configuration-store>"
     ```
 
+    If you use macOS or Linux, run the following command:
+
+    ```bash
+    export ConnectionString='<connection-string-of-your-app-configuration-store>'
+    ```
+    ---
+
 1. Restart Visual Studio to allow the change to take effect. 
 
 1. Press Ctrl + F5 to build and run the console app.