using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using OfficeOpenXml; using System.Text.RegularExpressions; namespace ExcelFillerTest { class Program { static void Main(string[] args) { using (ExcelPackage p = new ExcelPackage(new FileInfo("treso.xlsx"), true)) { p.Workbook.Worksheets[1].InsertRow(12, 5); } } } }