How can I store more than 1 million rows in excel sheet.

var workbook = new XSSFWorkbook();
var sheet = workbook.CreateSheet("USERReport");

string JSON = JsonConvert.SerializeObject(dataTable);

var items = JsonConvert.DeserializeObject<List<USERExcelSheet>>(JSON);

var columns = new[] { "DATETIME", "NAME", "ADDRESS", "MOBILE" };


var headers = new[] { "DATETIME", "NAME", "ADDRESS", "MOBILE" };

var headerRow = sheet.CreateRow(0);

for (int i = 0; i < columns.Length; i++)
{
    var cell = headerRow.CreateCell(i);
    cell.SetCellValue(headers[i]);
}

for (int i = 0; i < items.Count; i++)
{
    var rowIndex = i + 1;
    var row = sheet.CreateRow(rowIndex);

    for (int j = 0; j < columns.Length; j++)
    {
        var cell = row.CreateCell(j);
        var o = items[i];
        cell.SetCellValue(Convert.ToString(o.GetType().GetProperty(columns[j]).GetValue(o, null)));

    }
}
//if (!Directory.Exists( _env.WebRootPath + "\\" + "USERReport"))
//{

//    Directory.CreateDirectory(_env.WebRootPath + "\\" + "USERReport");
//}
if (!Directory.Exists(Path.Combine(_env.WebRootPath  , "USERReport")))
{

    Directory.CreateDirectory(Path.Combine(_env.WebRootPath, "USERReport"));
}
var FilePath = Path.Combine(_env.WebRootPath , "USERReport", FileName+".xlsx");
FileStream file = new FileStream(FilePath, FileMode.CreateNew, FileAccess.Write);
workbook.Write(file);
//stream.WriteTo(file);
workbook.Close();
file.Close();