Jun 17, 2019 03:30 AM|Wei Zhang|LINK
The EnumerateFiles and GetFiles methods differ as follows: When you use EnumerateFiles, you can start enumerating the collection of names before the whole collection is returned; when you use GetFiles, you must wait for the whole array of names to be returned
before you can access the array. Therefore, when you are working with many files and directories, EnumerateFiles can be more efficient.
According to your descriptions,since you have 1000 files ,I suggest that you could use EnumerateFiles. Here is the link,I hope it could help you.