void backgroundWorkerInsertion_DoWork(object sender, DoWorkEventArgs e)
        {
            DateTime insertionstartTime = DateTime.Now;
            InsertionSort(arrayInsertion);
            TimeSpan insertionDiff = DateTime.Now.Subtract(insertionstartTime);
            //rectInsertion.Height = diff.TotalMilliseconds / 10;
            backgroundWorkerInsertion.ReportProgress(0, insertionDiff.TotalMilliseconds);

        }

        void backgroundWorkerExchange_DoWork(object sender, DoWorkEventArgs e)
        {
            DateTime exchangestartTime = DateTime.Now;
            ExchangeSort(arrayExchange);
            TimeSpan insertionDiff = DateTime.Now.Subtract(exchangestartTime);
            //rectInsertion.Height = diff.TotalMilliseconds / 10;
            backgroundWorkerExchange.ReportProgress(0, exchangeDiff.TotalMilliseconds);

        }