public ActionResult ExportToExcel()
{
ViewBag.CurrentUser = getCurrentUser();
var projects = (from u in getDB().ProjectsSet
             select u).ToList();
// Load Excel application
Application excel = new Application();
// Create empty workbook
excel.Workbooks.Add();

//Workbook wb = new Workbook();

// Create Worksheet from active sheet
_Worksheet workSheet = excel.ActiveSheet;
// I created Application and Worksheet objects before try/catch,
// so that i can close them in finnaly block.
// It’s IMPORTANT to release these COM objects!!
try
{
    // ————————————————
    // Creation of header cells
    // ————————————————
    workSheet.Cells[1, "A"] = "Id";
    workSheet.Cells[1, "B"] = "Name";
    workSheet.Cells[1, "C"] = "Fast Track";

    // ————————————————
    // Populate sheet with some real data from ” Studentts” list
    // ————————————————
    int row = 2; // start row (in row 1 are header cells)
    foreach (Projects projet in projects)
    {
        workSheet.Cells[row, "A"] = projet.Id;
        workSheet.Cells[row, "B"] = projet.Name;
        workSheet.Cells[row, "C"] = projet.FastTrack;
        row++;
    }
    // Apply some predefined styles for data to look nicely ??
    workSheet.Range["A1"].AutoFormat(Microsoft.Office.Interop.Excel.XlRangeAutoFormat.xlRangeAutoFormatClassic1);
    //Autofit cells
    for(int y = 1; y == 25; y++)
    {
        workSheet.Columns[y].AutoFit();
    }
    // Define filename
    string test = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
    string fileName = string.Format(@"{0}ProjectsExport_as_of_" + DateTime.Now.ToShortDateString() + ".xlsx", Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory));
    // Save this data as a filestring fileName = "C:\ProjectsExport_as_of_"+DateTime.Now.ToShortDateString()+".xlsx";
    workSheet.SaveAs(fileName);

    return File(fileName, "application/vnd.ms-excel", "ProjectsExport_as_of_" + DateTime.Now.ToShortDateString() + ".xlsx");

}
catch (Exception exception)
{
    Console.Write(exception.InnerException);
    return null;
}
finally
{
    // Quit Excel application
    excel.Quit();
    // Release COM objects (very important!)
    if (excel != null)
        System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
    if (workSheet != null)
        System.Runtime.InteropServices.Marshal.ReleaseComObject(workSheet);
    // Empty variables
    excel = null;
    workSheet = null;
    // Force garbage collector cleaning
    GC.Collect();
}