The 32-bit CRC (Cyclic Redundancy Check) on the contents of the ZipEntry.
![](collapse_all.gif)
![](collapse_all.gif)
You probably don't need to concern yourself with this. It is used internally by DotNetZip to verify files or streams upon extraction.
The value is a 32-bit CRC using 0xEDB88320 for the polynomial. This is the same CRC-32 used in PNG, MPEG-2, and other protocols and formats. It is a read-only property; when creating a Zip archive, the CRC for each entry is set only after a call to Save() on the containing ZipFile. When reading an existing zip file, the value of this property reflects the stored CRC for the entry.