private async Task SendReportMailWithHeaderImageAsync(IEnumerable <NinjaDTO> data, string emailAddress) { var headerImagePath = string.Format("{0}/{1}", _environment.WebRootPath, "images/mail-header-solid.png"); var mailingModel = new MailContentDTO(); mailingModel.HeaderImage = new LinkedResource { ContentId = "header", ContentPath = headerImagePath, ContentType = "image/png" }; mailingModel.HtmlContent = await GetGridContentAsync(data); _mailingService.Send(emailAddress, "Your Report", mailingModel); }