How to attach document files to the mails by using sendgrid

Question

I would like to attach some files which are at uploading time, but not getting emails where I could save the files everything is good to run.

 

public ContentResult CompleteAssignedTask(int AssignedTaskId, string FromEmail, string[] fileNames)

{

var client = new SendGridClient("mycode");

var from = new EmailAddress("[email protected]", "The SaharaCRM");

var to = new EmailAddress(customer.Email, customer.CustName);

var htmlContent = body;

var msg = MailHelper.CreateSingleEmail(from, to, taskRecord.Subject, "", htmlContent);

msg.AddAttachments(fileNames);

var response = client.SendEmailAsync(msg);

}