FileInfo file = new FileInfo(@"d:\test.xlsx");
            using (ExcelPackage package = new ExcelPackage(file))
            {
                // add a new worksheet to the empty workbook
                ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Employee2");
                //First add the headers
                worksheet.Cells[1, 1].Value = "ID";
                worksheet.Cells[1, 2].Value = "Name";
                worksheet.Cells[1, 3].Value = "Gender";
                worksheet.Cells[1, 4].Value = "Salary (in $)";
                

                //Add values
                worksheet.Cells["A2"].Value = 1000;
                worksheet.Cells["B2"].Value = "Jon";
                worksheet.Cells["C2"].Value = "M";
                worksheet.Cells["D2"].Value = 5000;

                worksheet.Cells["A3"].Value = 1001;
                worksheet.Cells["B3"].Value = "Graham";
                worksheet.Cells["C3"].Value = "M";
                worksheet.Cells["D3"].Value = 10000;

                worksheet.Cells["A4"].Value = 1002;
                worksheet.Cells["B4"].Value = "Jenny";
                worksheet.Cells["C4"].Value = "F";
                worksheet.Cells["D4"].Value = 5000;

                worksheet.InsertRow(1, 2);//在第一行前面插入2行
                package.Save(); //Save the workbook.
            }