public async Task <ActionResult> SendProposal(int?id)
        {
            if (id == null)
            {
                return(RedirectToAction("Index"));
            }
            else
            {
                string email = await leadsManager.GetLeadEmailAsync(id).ConfigureAwait(false);

                SendProposalViewModel sendViewModel = new SendProposalViewModel();
                sendViewModel.Lead_ID = id;
                sendViewModel.To      = email;
                return(PartialView(sendViewModel));
            }
        }