<PackageReference Include="System.Diagnostics.DiagnosticSource" Version="11.0.0-preview.5.26302.115" />

System.Diagnostics.Activity

public class Activity : IDisposable
Represents an operation with context to be used for logging.
namespace System.Diagnostics { public readonly struct ActivityChangedEventArgs { public Activity Previous { get; set; } public Activity Current { get; set; } } }