michael_wp原创：用.net实现zip----4-2

///

Global information about the zip file.

    [StructLayout(LayoutKind.Sequential)]
    internal struct ZipFileInfo {
        ///

The number of entries in the directory.

        public UInt32 EntryCount;
        ///

Length of zip file comment in bytes (8 bit characters).

        public UInt32 CommentLength;
    }
    [StructLayout(LayoutKind.Sequential)]
    internal struct ZipFileEntryInfo {
        public ZipDateTimeInfo DateTime;
        public UInt32 DosDate;
        public UInt32 InternalFileAttributes; // 2 bytes
        public UInt32 ExternalFileAttributes; // 4 bytes
    }
    ///

Custom ZipLib date time structure.

    [StructLayout(LayoutKind.Sequential)]
    internal struct ZipDateTimeInfo {
        ///

Seconds after the minute - [0,59]

        public UInt32 Seconds;