# System.Net.Http.Metrics

``` diff
+namespace System.Net.Http.Metrics {
+    public sealed class HttpMetricsEnrichmentContext {
+        public Exception? Exception { get; }
+        public HttpRequestMessage Request { get; }
+        public HttpResponseMessage? Response { get; }
+        public static void AddCallback(HttpRequestMessage request, Action<HttpMetricsEnrichmentContext> callback);
+        public void AddCustomTag(string name, object? value);
+    }
+}
```

