Merge pull request #248777 from AaronMaxwell/aaronmax-functions-availability-sample

Adding basic code sample

Author: Stacyrch140

articles/azure-monitor/app/availability-azure-functions.md

@@ -13,12 +13,12 @@ This article explains how to review [TrackAvailability()](/dotnet/api/microsoft.
 
 > [!div class="checklist"]
 > - [Workspace-based Application Insights resource](create-workspace-resource.md)
-> - Access to the source code of a [function app](../../azure-functions/functions-how-to-use-azure-function-app-settings.md) in Azure Functions.
-> - Developer expertise capable of authoring custom code for [TrackAvailability()](/dotnet/api/microsoft.applicationinsights.telemetryclient.trackavailability), tailored to your specific business needs
+> - Access to the source code of a [function app](../../azure-functions/functions-how-to-use-azure-function-app-settings.md) in Azure Functions
+> - Developer expertise capable of authoring [custom code](#basic-code-sample) for [TrackAvailability()](/dotnet/api/microsoft.applicationinsights.telemetryclient.trackavailability), tailored to your specific business needs
 
 > [!NOTE]
-> - TrackAvailability() requires that you have made a developer investment in custom code.
-> - [Standard tests](availability-standard-tests.md) should always be used if possible as they require little investment and have few prerequisites.
+> - [TrackAvailability()](/dotnet/api/microsoft.applicationinsights.telemetryclient.trackavailability) requires that you make a developer investment in custom code.
+> - [Standard tests](availability-standard-tests.md) **should always be used if possible** as they require little investment, no maintenance, and have few prerequisites.
 
 ## Check availability
 
@@ -43,6 +43,25 @@ You can use Log Analytics to view your availability results, dependencies, and m
 
 :::image type="content" source="media/availability-azure-functions/dependencies.png" alt-text="Screenshot that shows the New Query tab with dependencies limited to 50." lightbox="media/availability-azure-functions/dependencies.png":::
 
+## Basic code sample
+
+The following example demonstrates a web availability test that requires a simple URL ping using the `getStringAsync()` method.
+
+```csharp
+using System.Net.Http;
+
+public async static Task RunAvailabilityTestAsync(ILogger log)
+{
+    using (var httpClient = new HttpClient())
+    {
+        // TODO: Replace with your business logic
+        await httpClient.GetStringAsync("https://www.bing.com/");
+    }
+}
+```
+
+For advanced scenarios where the business logic must be adjusted to access the URL, such as obtaining tokens, setting parameters, and other test cases, custom code is necessary.
+
 ## Next steps
 
 * [Standard tests](availability-standard-tests.md)