[c#] How to check if a file exists in a folder?

It can be improved like so:

if(Directory.EnumerateFileSystemEntries(ProcessingDirectory, "*.xml").ToList<string>().Count == 0)
    log.Info("no files present")

Alternatively:

log.Info(Directory.EnumerateFileSystemEntries(ProcessingDirectory, "*.xml").ToList<string>().Count + " file(s) present");

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