after email deleting attachment file, error “The process cannot access the file because it is being used by another process.”

Question

I am doing an email form. Email has attachments and after attaching files email is sent. Next there is requirement to delete file from server. When I tried to get the file i

Answer 1

After execute "SendMessageGmail", free the attachment of MailMessage.Attachments by iterating.

SendMessageGmail(oMess);
if(oMess.Attachments != null) {
  for(Int32 I = oMess.Attachments.Count - 1; I >= 0;I--) {
    oMess.Attachments[i].Dispose();
  }
  oMess.Attachments.Clear();
  oMess.Attachments.Dispose();
}
oMess.Dispose();
oMess = null;