Merge pull request #191027 from pizzaz93/patch-2

Update api-custom-events-metrics.md

Author: PRMerger-2

articles/azure-monitor/app/api-custom-events-metrics.md

@@ -634,12 +634,22 @@ Normally, the SDK sends data at fixed intervals (typically 30 secs) or whenever
 
 *.NET*
 
+When using Flush(), we recommend this [pattern](./console.md#full-example):
+
 ```csharp
 telemetry.Flush();
 // Allow some time for flushing before shutdown.
 System.Threading.Thread.Sleep(5000);
 ```
 
+When using FlushAsync(), we recommend this pattern:
+
+```csharp
+await telemetryClient.FlushAsync()
+```
+
+We recommend always flushing as part of the application shutdown to guarantee that telemetry is not lost.
+
 *Java*
 
 ```java
@@ -656,7 +666,8 @@ telemetry.flush();
 
 The function is asynchronous for the [server telemetry channel](https://www.nuget.org/packages/Microsoft.ApplicationInsights.WindowsServer.TelemetryChannel/).
 
-We recommend using the flush() or flushAsync() methods in the shutdown activity of the Application when using the .NET SDK. 
+> [!NOTE]
+> The Java and Javascript SDKs automatically flush on application shutdown.
 
 ## Authenticated users