/// <summary>
/// Create a GZipStream using the specified CompressionMode and the specified CompressionLevel,
/// and explicitly specify whether the stream should be left open after Deflation or Inflation.
/// </summary>
/// <remarks>
/// <para>
/// This constructor allows the application to request that the captive stream remain open after
/// the deflation or inflation occurs. By default, after Close() is called on the stream, the
/// captive stream is also closed. In some cases this is not desired, for example if the stream
/// is a memory stream that will be re-read after compressed data has been written to it. Specify true for the
/// leaveOpen parameter to leave the stream open.
/// </para>
/// <para>
/// As noted in the class documentation,
/// the CompressionMode (Compress or Decompress) also establishes the "direction" of the stream.
/// A GZipStream with CompressionMode.Compress works only through Write(). A GZipStream with
/// CompressionMode.Decompress works only through Read().
/// </para>
/// </remarks>
/// <example>
/// This example shows how to use a DeflateStream to compress data.
/// <code>
/// using (System.IO.Stream input = System.IO.File.OpenRead(fileToCompress))
/// {
/// using (var raw = System.IO.File.Create(outputFile))
/// {
/// using (Stream compressor = new GZipStream(raw, CompressionMode.Compress, CompressionLevel.BestCompression, true))
/// {
/// byte[] buffer = new byte[WORKING_BUFFER_SIZE];
/// int n;
/// while ((n= input.Read(buffer, 0, buffer.Length)) != 0)
/// {
/// compressor.Write(buffer, 0, n);
/// }
/// }
/// }
/// }
/// </code>
/// <code lang="VB">
/// Dim outputFile As String = (fileToCompress & ".compressed")
/// Using input As Stream = File.OpenRead(fileToCompress)
/// Using raw As FileStream = File.Create(outputFile)
/// Using compressor As Stream = New GZipStream(raw, CompressionMode.Compress, CompressionLevel.BestCompression, True)
/// Dim buffer As Byte() = New Byte(4096) {}
/// Dim n As Integer = -1
/// Do While (n <> 0)
/// If (n > 0) Then
/// compressor.Write(buffer, 0, n)
/// End If
/// n = input.Read(buffer, 0, buffer.Length)
/// Loop
/// End Using
/// End Using
/// End Using
/// </code>
/// </example>
/// <param name="stream">The stream which will be read or written.</param>
/// <param name="mode">Indicates whether the GZipStream will compress or decompress.</param>
/// <param name="leaveOpen">true if the application would like the stream to remain open after inflation/deflation.</param>
/// <param name="level">A tuning knob to trade speed for effectiveness.</param>
public GZipStream(Stream stream)
{
_baseStream = new ZlibBaseStream(stream, ZlibStreamFlavor.GZIP, false);
}
public ZlibStream(System.IO.Stream stream)
{
_baseStream = new ZlibBaseStream(stream, ZlibStreamFlavor.ZLIB, false);
}