public string ReminderMail()
{
var date = string.Format("Due Date : {0}", DueDate.ToString("ddd, dd MMM yyyy"));
var composer = new HtmlComposer();
composer.AppendDiv("This is gentle reminder for the task assigned to you.")
.AppendHead("Task : " + Title)
.AppendDiv(date)
.AppendDiv("Click the below link for more details")
.AppendLink(Routes.ActivityUrl(ActivityId), Routes.ActivityUrl(ActivityId));
return(composer.Text.ToString());
}