# System.Diagnostics

``` diff
 namespace System.Diagnostics {
     public sealed class ActivitySource : IDisposable {
+        public Activity CreateActivity(string name, ActivityKind kind);
+        public Activity CreateActivity(string name, ActivityKind kind, ActivityContext parentContext, IEnumerable<KeyValuePair<string, object>> tags = null, IEnumerable<ActivityLink> links = null, ActivityIdFormat idFormat = ActivityIdFormat.Unknown);
+        public Activity CreateActivity(string name, ActivityKind kind, string parentId, IEnumerable<KeyValuePair<string, object>> tags = null, IEnumerable<ActivityLink> links = null, ActivityIdFormat idFormat = ActivityIdFormat.Unknown);
     }
 }
```

