public async Task <IActionResult> SendMail()
{
var filePath = _hostingEnvironment.ContentRootPath + @"/ProjectNotes/VoucherDetails.pdf";
var result = await _ISendGridEmailSender.Execute(filePath);
Thread.Sleep(3000);
ViewBag.SendGridStatusCode = result.Item1;
ViewBag.SendGridHeaders = result.Item2.Replace("\r\n", " <***> ");
ViewBag.SendGridBody = result.Item3.Replace("\r\n", " <***> ");
return(await Task.Run(() => View()));
}