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Encoding is not honored by ZipOutputStream.PutNextEntry method
In ZipOutputStream.PutNextEntry method's implementation, it lacks a line of code like below:
_currentEntry.ProvisionalAlternateEncoding = this.ProvisionalAlternateEncoding;
With this issue, if you only set the ProvisionalAlternateEncoding of ZipOutputStream and use it to output a zip stream, and then a zip file, the zip file will show its entry names as "????" if it contains non-ASCII characters.