Specifies values that indicate whether a compression operation emphasizes speed or compression size.
Syntax
Remarks
Compression operations usually involve a tradeoff between the speed and the effectiveness of compression. You use the System.IO.Compression.CompressionLevel 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 System.IO.Compression.DeflateStream, System.IO.Compression.GZipStream, System.IO.Compression.ZipArchive, System.IO.Compression.ZipFile, and System.IO.Compression.ZipFileExtensions classes include a parameter named compressionLevel that lets you specify the compression level:
Members
| Member Name | Description |
|---|---|
| Fastest |
The compression operation should complete as quickly as possible, even if the resulting file is not optimally compressed. |
| NoCompression |
No compression should be performed on the file. |
| Optimal |
The compression operation should be optimally compressed, even if the operation takes a longer time to complete. |
Requirements
Assembly: System (in System.dll)
Assembly Versions: 4.0.0.0