/// <summary>
/// Construct scope
/// </summary>
/// <param name="context">work context</param>
/// <param name="message">message (optional)</param>
/// <param name="eventLog">event log (optional, default is toolbox's event source</param>
public ActivityScope(IWorkContext context, string message = null, IEventLog eventLog = null)
{
Verify.IsNotNull(nameof(context), context);
Context = context;
EventLog = eventLog ?? ToolboxEventSource.Log;
Message = message;
Stopwatch = Stopwatch.StartNew();
EventLog.ActivityStart(Context, Message);
}