Crisis.Ionic.Zip.ZipEntry.ReadExtraField C# (CSharp) Method

        private void ReadExtraField()
        {
            _readExtraDepth++;
            // workitem 8098: ok (restore)
            long posn = this.ArchiveStream.Position;
            this.ArchiveStream.Seek(this._RelativeOffsetOfLocalHeader, SeekOrigin.Begin);
            // workitem 10178
            Crisis.Ionic.Zip.SharedUtilities.Workaround_Ladybug318918(this.ArchiveStream);

            byte[] block = new byte[30];
            this.ArchiveStream.Read(block, 0, block.Length);
            int i = 26;
            Int16 filenameLength = (short)(block[i++] + block[i++] * 256);
            Int16 extraFieldLength = (short)(block[i++] + block[i++] * 256);

            // workitem 8098: ok (relative)
            this.ArchiveStream.Seek(filenameLength, SeekOrigin.Current);
            // workitem 10178
            Crisis.Ionic.Zip.SharedUtilities.Workaround_Ladybug318918(this.ArchiveStream);

            ProcessExtraField(this.ArchiveStream, extraFieldLength);

            // workitem 8098: ok (restore)
            this.ArchiveStream.Seek(posn, SeekOrigin.Begin);
            // workitem 10178
            Crisis.Ionic.Zip.SharedUtilities.Workaround_Ladybug318918(this.ArchiveStream);
            _readExtraDepth--;
        }