public List <ClienteBean> ReadFromExcel(string keyName)
        {
            string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, ExcelPath);

            List <ClienteBean> clientes = new List <ClienteBean>();

            Excel.Application ExcelApp = new Excel.Application();
            Excel.Workbooks   ExcelWorkbooks;
            Excel.Workbook    ExcelWorkbook;
            Excel.Worksheet   ExcelWorksheet;
            Excel.Range       ExcelRange;

            ExcelWorkbooks = ExcelApp.Workbooks;
            ExcelWorkbook  = ExcelWorkbooks.Open(path);
            ExcelWorksheet = ExcelWorkbook.Sheets[1];
            ExcelRange     = ExcelWorksheet.UsedRange;

            int rowCount = ExcelRange.Rows.Count;
            int colCount = ExcelRange.Columns.Count;

            string[] headers = new string[colCount];
            for (int i = 1; i <= colCount; i++)
            {
                headers[i - 1] = (Convert.ToString((ExcelRange.Cells[1, i] as Excel.Range).Value2));
            }
            for (int j = 2; j <= rowCount; j++)
            {
                string Key = Convert.ToString((ExcelRange.Cells[j, 1] as Excel.Range).Value2);
                if (Key.Equals(keyName))
                {
                    ClienteBean clienteBean = new ClienteBean();
                    clienteBean.Apellido      = Convert.ToString((ExcelRange.Cells[j, 2] as Excel.Range).Value2);
                    clienteBean.Nombre        = Convert.ToString((ExcelRange.Cells[j, 3] as Excel.Range).Value2);
                    clienteBean.Dni           = Convert.ToString((ExcelRange.Cells[j, 4] as Excel.Range).Value2);
                    clienteBean.Sexo          = Convert.ToString((ExcelRange.Cells[j, 5] as Excel.Range).Value2);
                    clienteBean.Nivelestudios = Convert.ToString((ExcelRange.Cells[j, 6] as Excel.Range).Value2);
                    clienteBean.Telefono      = Convert.ToString((ExcelRange.Cells[j, 7] as Excel.Range).Value2);
                    clienteBean.Edad          = Convert.ToString((ExcelRange.Cells[j, 8] as Excel.Range).Value2);
                    clienteBean.Resultado     = Convert.ToString((ExcelRange.Cells[j, 9] as Excel.Range).Value2);
                    clientes.Add(clienteBean);
                }
                continue;
            }

            ExcelWorkbook.Close();
            ExcelWorkbooks.Close();
            ExcelApp.Quit();

            Marshal.ReleaseComObject(ExcelRange);
            Marshal.ReleaseComObject(ExcelWorksheet);
            Marshal.ReleaseComObject(ExcelWorkbooks);
            Marshal.ReleaseComObject(ExcelWorkbook);
            Marshal.ReleaseComObject(ExcelApp);

            return(clientes);
        }