System 4.0.0.0 System.Enum Compression operations usually involve a tradeoff between the speed and the effectiveness of compression. You use the enumeration to indicate which factor is more important in your development scenario: the time to complete the compression operation or the size of the compressed file. These values do not correspond to specific compression levels; the object that implements compression determines how to handle them. The following methods of the , , , , and classes include a parameter named compressionLevel that lets you specify the compression level:

Specifies values that indicate whether a compression operation emphasizes speed or compression size.

Field 4.0.0.0 System.IO.Compression.CompressionLevel

The compression operation should complete as quickly as possible, even if the resulting file is not optimally compressed.

Field 4.0.0.0 System.IO.Compression.CompressionLevel

No compression should be performed on the file.

Field 4.0.0.0 System.IO.Compression.CompressionLevel

The compression operation should be optimally compressed, even if the operation takes a longer time to complete.