C#

public Boolean LoadData()
        {
            Boolean bComplete = false;
            Int32 nTotalData = 10000;
            this.tasks = new Task[nTotalData];
            DateTime dtStartTime = DateTime.Now;

            ProcessingBarsCS.StartTime();
            var parent = Task.Factory.StartNew(() =>
            {
                dtStartTime = DateTime.Now;

                for (Int32 nData = 0; nData < nTotalSymbols; nData++)
                {
                    bComplete = GetData_Task(nData, dtStartTime, nTotalData);
                }
            });
            parent.Wait();
            ProcessingBarsCS.StopTime();

            return bComplete;
        }

        Boolean GetData_Task(Int32 nData, DateTime  dtStartTime, Int32 nTotalData)
        {
            DataCS dataCS = new DataCS();
            tasks[nData] = Task.Factory.StartNew(() =>
            {
                nData = dataCS.Data();
            })
                .ContinueWith(antecendent => ProcessingData(nData));

            // *****
            tasks[nData].Wait();

            // Wait for all task to finish calculations
            try
            {
                Task.WaitAll(tasks);
                SetData_ElapsedTime(dtStartTime, nTotalData);
            }
            catch { }

            return true;
        }