When extracting single file from archive "FileExtractionStarted", "Extracting" and "FileExtractionFinished" event show all files extracting. about sevenzipsharp

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Sorry for the delay, I gave an answer on StackOverflow, which I'll duplicate here:

The reason you're getting so many file extraction events when just trying to extract one file is due to the fact that 7z archives are created using solid compression.

When you try to extract a single file from a solid archive, the decompression starts at the beginning of the file and goes through it until it finds the file you were looking for. Your archive is the worst-case scenario, where the file you're looking for is at the end of the archive (your results show "New Text Document.txt" being extracted last).

The solution to your problem depends on what you need to achieve in the end, and what power you have over the creation of the archive. If you need to extract just the one file, and can change the archive format, I'd aim for some format that does not use solid compression (eg. zip). If you're forced to use the 7z file, and need to use several of the files, the best course would probably be to extract them all to a temporary directory and work on them there.