var excel = new ExcelQueryFactory(pathToExcelFile);
            string sheetName = "Sheet1";
            var persons = from a in excel.WorksheetNoHeader(sheetName)
                          where a[1] == "Mashhad" //مقدار در ستون دوم 
                          select a;
            foreach (var a in persons)
              {
                  for(int i=0;i<a.Count;i++)
                        MessageBox.Show(a[i]); 
              }

using System;
using System.IO;
using OfficeOpenXml;

namespace ExcelDataReader
{
    class Program
    {
        /// <summary>
        /// PM> Install-Package EPPlus
        /// </summary>
        static void Main(string[] args)
        {
            var filePath = "sample.xlsx";
            var fileInfo = new FileInfo(filePath);
            if (!fileInfo.Exists)
            {
                throw new FileNotFoundException($"{filePath} file not found.");
            }

            var worksheetName = "Sheet1";
            using (var package = new ExcelPackage(fileInfo))
            {
                var worksheet = package.Workbook.Worksheets[worksheetName];
                var startCell = worksheet.Dimension.Start;
                var endCell = worksheet.Dimension.End;

                for (var row = startCell.Row; row < endCell.Row + 1; row++)
                {
                    for (var col = startCell.Column; col <= endCell.Column; col++)
                    {
                        var header = worksheet.Cells[1, col].Value ?? worksheet.Cells[2, col].Value;
                        var name = header?.ToString();
                        var value = worksheet.Cells[row, col].Value;
                        //var intValue = Convert.ChangeType(value, typeof(int)) as int?;
                        Console.WriteLine($" row[{row}]:col[{col}] -> {name} : {value}");
                    }
                    Console.WriteLine();
                }
            }
        }
    }
}

var intValue = Convert.ChangeType(value, typeof(int)) as int?;