The array of bytes to compress. A maximum of count bytes are taken from this array and compressed
offset
The byte offset in buffer at which to begin taking the data to compress.
count
The maximum number of bytes to be taken from buffer.
method
A CompressionMethod value representing the compression method to use.
level
A CompressionLevel value representing the compression level to use.
Return Value
An array of bytes containing the compressed data. Can be empty.
Remarks
If the data to compress is not a byte array, it will need to be converted into a byte array before it can be compressed. This can be done, in the case of a string, using the System.Text.Encoding.GetBytes(System.Char[]) method of the System.Text.Encoding class.
The BZip, BWT, and PPMd compression methods are not supported. The compression level only applies to the Deflated and Deflated64 compression methods.
The PPMd algorithm uses a custom memory management system called SubAllocator. In a zip file, the memory size the SubAllocator uses is defined in the WinZip PPMd header for the compressed file and this header's value is used when decompressing the data. In general, WinZip uses 64Mb. Since the algorithm used was not optimized from the original PPMd version I revision 1, the SubAllocator initially requires the total amount of memory specified in the PPMd compressor. This means you must have at least 64 free Mb of RAM when using this compression method.
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2