Excel.Worksheet xlWorkSheetTwo = null;
        // put down the pin map onNetlist worksheet
        xlWorkSheetTwo = xlWorkBook.Worksheets.get_Item(2);
        int rowLocalTwo = 5;
        int colLocalTwo = 1;

        int connCountTwo = nldLocal.pinMap.Count;

        for (int i = 0; i < connCountTwo; i++)
        {
            xlWorkSheetTwo.Cells[rowLocalTwo, colLocalTwo] = (i + 1).ToString();
            xlWorkSheetTwo.Cells[rowLocalTwo, colLocalTwo + 1] = nldLocal.pinMap[i].conLeftName;
            xlWorkSheetTwo.Cells[rowLocalTwo, colLocalTwo + 2] = nldLocal.pinMap[i].pinLeftName;
            xlWorkSheetTwo.Cells[rowLocalTwo, colLocalTwo + 4] = nldLocal.pinMap[i].conRightName;
            xlWorkSheetTwo.Cells[rowLocalTwo, colLocalTwo + 5] = nldLocal.pinMap[i].pinRightName;
            rowLocalTwo++;
        }
        endThreadTwo = true;
        e.Cancel = true;

BackgroundWorker bwSheet2 = new BackgroundWorker();
    bwSheet2.DoWork += new DoWorkEventHandler(bwSheet2_DoWork);
    bwSheet2.RunWorkerAsync();
    bwSheet2.RunWorkerCompleted +=
        new RunWorkerCompletedEventHandler(bwSheet2_RunWorkerCompleted);