Change filename when file drops into folder

I'm new at c#. I want to be able to drag and drop some .MSG files i开发者_运维知识库nto a folder and I'd like to change the filenames uniquely. I've no idea what to do. Any ideas?

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If the file name isn't unique, then it'll be pretty hard to drop it into the folder in the first place - but that's beside the point.

You can watch a folder using the FileSystemWatcher class. You can generate a unique name in a number of ways - something involving Guid.NewGuid() will always work of course.