public async Task<ActionResult> Upload(FileUploadViewModel model)
 {
     int t1 = Thread.CurrentThread.ManagedThreadId;
     List<Employee> employees = await Task.Factory.StartNew<List<Employee>>
         (() => GetEmployees(model));
     int t2 = Thread.CurrentThread.ManagedThreadId;
     EmployeeBusinessLayer bal = new EmployeeBusinessLayer();
     bal.UploadEmployees(employees);
     return RedirectToAction("Index", "Employee");
 }
        private List<Employee> GetEmployees(FileUploadViewModel model)
        {
            List<Employee> employees = new List<Employee>();
            StreamReader csvreader = new StreamReader(model.fileUpload.InputStream);
            csvreader.ReadLine();
            while (!csvreader.EndOfStream)
            {
                var line = csvreader.ReadLine();
                var values = line.Split(',');
                Employee e = new Employee();
                e.FirstName = values[0];
                e.LastName = values[1];
                e.Salary = int.Parse(values[2]);
                employees.Add(e);
            }

            return employees;
        }