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copied!<p>What it seems that you want to do is create a metrics object for each iteration, and then aggregate them at the end:</p> <pre><code>private ConcurrentBag<Metrics> allMetrics = new ConcurrentBag<Metrics>(); private int DegreeOfParallelism { get { return Convert.ToInt32(ConfigurationManager.AppSettings["DegreeOfParallelism"].ToString()); } } var lOptions = new ParallelOptions() { MaxDegreeOfParallelism = DegreeOfParallelism }; Parallel.ForEach(RequestBag, lOptions, (lItem, loopState) => { if (!string.IsNullOrEmpty(lItem.XmlRequest)) { try { var Metrics = new Metrics(); var Stopwatch = new Stopwatch(); Stopwatch.Start(); ObjRef = new Object(); lItem.XmlRequest = ObjRef.GetDecision(Username, Password); Stopwatch.Stop(); Metrics.ElapsedTime = string.Format("{0:0.00}", Stopwatch.Elapsed.TotalSeconds); Stopwatch.Restart(); if (!string.IsNullOrEmpty(DBConnectionString)) { DataAccess = new DataAccess2(DBConnectionString); DataAccess.WriteToDB(lItem.XmlRequest); } Stopwatch.Stop(); Metrics.DbFuncCallTime = string.Format("{0:0.00}", Stopwatch.Elapsed.TotalSeconds); } catch (Exception pEx) { KeepLog(pEx); Metrics.HasFailed = true; } finally { ProcessedIdsBag.Add(lItem.OrderId); Metrics.ProcessedOrderId = lItem.OrderId; Metrics.DegreeOfParallelism = DegreeOfParallelism; Metrics.TotalNumOfOrders = NumberOfOrders; Metrics.TotalNumOfOrdersProcessed = ProcessedIdsBag.Count; pBackgroundWorker.ReportProgress(Metrics.GetProgressPercentage(NumberOfOrders, ProcessedIdsBag.Count), Metrics); RequestBag.TryTake(out lItem); allMetrics.add(Metrics); } } }); // Aggregate everything in AllMetrics here </code></pre>

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