namespace System.IO.Compression { public class DeflateStream : Stream { public Stream BaseStream { get; } public DeflateStream(Stream stream, CompressionLevel compressionLevel); public DeflateStream(Stream stream, CompressionLevel compressionLevel, bool leaveOpen); public DeflateStream(Stream stream, CompressionMode mode); public DeflateStream(Stream stream, CompressionMode mode, bool leaveOpen); } }