Ionic Zip Library v1.9.1.6
CrcCalculatorStream Constructor (stream, length, leaveOpen, crc32)
Reference ► Ionic.Crc ► CrcCalculatorStream ► CrcCalculatorStream(Stream, Int64, Boolean, CRC32)
A constructor allowing the specification of the length of the stream
to read, as well as whether to keep the underlying stream open upon
Close(), and the CRC32 instance to use.

C# | Visual Basic | Visual C++ |

The stream uses the specified CRC32 instance, which allows the application to specify how the CRC gets calculated.