Multiple files in memory stream in one result file for SevenZipCompressor

Question

This has been for SharpZipLib

What could be equivelant PutNextEntry equivalent for SevenZipCompressor ?

I tried

MemoryStream ms = new MemoryStream(fileByteList.First().Binary);
MemoryStream compressedStream = new MemoryStream(); 
SevenZip.SevenZipCompressor compressor = new SevenZip.SevenZipCompressor();
compressor.DefaultItemName = "toto";
compressor.CompressionMethod = SevenZip.CompressionMethod.Lzma2;
compressor.CompressionLevel = SevenZip.CompressionLevel.Normal;
compressor.CompressStream(ms, compressedStream);


compressor = new SevenZip.SevenZipCompressor();
compressor.CompressionMethod = SevenZip.CompressionMethod.Lzma2;
compressor.CompressionLevel = SevenZip.CompressionLevel.Normal;
compressor.DefaultItemName = "toto2";
MemoryStream ms2 = new MemoryStream(fileByteList[1].Binary); 
compressor.CompressStream(ms2, compressedStream);

MemoryStream ms3 = new MemoryStream();
SevenZip.SevenZipExtractor extractor = new SevenZip.SevenZipExtractor(compressedStream);
extractor.ExtractFile(0, ms3);

which gives error:

An exception of type 'SevenZip.SevenZipArchiveException' occurred in SevenZipSharp.dll but was not handled in user code
Invalid archive: open/read error! Is it encrypted and a wrong password was provided?
If your archive is an exotic one, it is possible that SevenZipSharp has no signature for its format and thus decided it is TAR by mistake. occurred