restore section

Author: matt-hensley

docs/configuration.md

@@ -175,6 +175,37 @@ populated with a comma-separated list of
 export GRAFANA_DOTNET_DISABLE_INSTRUMENTATIONS="Process,NetRuntime"
 ```
 
+### Adding instrumentations not supported by the distribution
+
+Instrumentations not included in the distribution can easily be added by
+extension methods on the tracer and meter provider.
+
+For example, if it is desired to use the `EventCounters` instrumentation, which is
+not included in the [full package](./installation.md#install-the-full-package-with-all-available-instrumentations),
+one install the `EventCounters` instrumentation library along with the base
+package.
+
+```sh
+dotnet add package --prerelease Grafana.OpenTelemetry.Base
+dotnet add package OpenTelemetry.Instrumentation.EventCounters --prerelease
+```
+
+Then, the `EventCounters` instrumentation can be enabled via the [`AddEventCountersInstrumentation`](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/tree/main/src/OpenTelemetry.Instrumentation.EventCounters#step-2-enable-eventcounters-instrumentation)
+extension method, alongside the `UseGrafana` method.
+
+```csharp
+using var tracerProvider = Sdk.CreateTracerProviderBuilder()
+    .UseGrafana()
+    .AddEventCountersInstrumentation(options => {
+        options.RefreshIntervalSecs = 1;
+        options.AddEventSources("MyEventSource");
+    })
+    .Build();
+```
+
+This way, any other instrumentation library [not supported by the distribution](./supported-instrumentations.md)
+can be added according to the documentation provided with it.
+
 ## Resource detector configuration
 
 ### Specifying resource detectors