A value representing the build number of the file.

Typically, a version number is displayed as "major number.minor number.build number.private part number". A file version number is a 64-bit number that holds the version number for a file as follows:

• The first 16 bits are the FileMajorPart number.
• The next 16 bits are the FileMinorPart number.
• The third set of 16 bits are the FileBuildPart number.
• The last 16 bits are the FilePrivatePart number.

This property gets the third set of 16 bits.