Download jQuery DataTable to CSV file in ASP.Net MVC

Dear Developers,

I am creating an application, in that i have to download jquery datatable as csv file.

Now am downloading as pdf file using the below code on GenericReportController.cs

C# Code

public FileResult ExportCsv(string viewdataName, string fileName)
{
    var data = "";
    data = TempData[viewdataName].ToString();
    TempData[viewdataName] = data;
    var dt = (DataTable)JsonConvert.DeserializeObject(data, (typeof(DataTable)));
    if (dt.Rows.Count > 0)
    {
        dt.TableName = fileName.Replace('/', '_');
        using (XLWorkbook wb = new XLWorkbook())
        {
            wb.Worksheets.Add(dt);
            using (MemoryStream stream = new MemoryStream())
            {
                wb.SaveAs(stream);
                return File(stream.ToArray(), "application/octet-stream", fileName + ".csv");
            }
        }
    }
    else
    return null;
}

How can i download to csv file, kindly suggest me to i am done this task.

Regards

Paul.S