病毒扫描程序锁定和删除临时文件 - 处理它们的最佳方法是什么？

My application deals with e-mails coming from different sources, e.g. Outlook and IMAP mailboxes. Before parsing them, I write them to the temporary directory (keeping them in memory is not an option). While parsing, I might be writing attachments to the temp directory (for example, if they are too large to keep in memory or for full-text extraction).My application deals with e-mails coming from d