问题
We all might have noticed the creation of a file named "~$filename.docx"(hidden) when opening filename.docx using MS Word
What is the purpose of this file?
Why is it created and what does it contain?
回答1:
It maintains temporary information about the current state of the document.
Have you ever encountered a crash and when you open Word it asks you to recover certain documents that were being edited? That's where it gets that information.
来源：https://stackoverflow.com/questions/28950333/why-a-file-starting-with-is-created-when-opening-a-word-document