Email Attachement -file is being used by another process

 Hi,
I have a code that sends email using smtp server. There is an attachement file called test.pdf. the code is like this. This code is called from button Click event.
Try sBody.AppendFormat("<b>test</b>") 'Assign mail attributes mailCurrent.Subject = "testSubject" mailCurrent.Body = sBody.ToString() mailCurrent.To.Add(SendToEmail) mailCurrent.Bcc.Add(ConfigurationManager.AppSettings("EmailBlindCopyMailbox")) mailCurrent.From = New MailAddress(FromEmail) mailCurrent.IsBodyHtml = True mailCurrent.Headers.Add("Disposition-Notification-To", FromEmail) mailCurrent.Headers.Add("Return-Receipt-To", FromEmail) 'Attach the pdf file mailCurrent.Attachments.Add(New Sy ...