DeflaterOutputStream.Flush Method 

Flushes the stream by calling flush() on the deflater and then on the underlying stream. This ensures that all bytes are flushed.

[Visual Basic]
Overrides Public Sub Flush()

[C#]
public override void Flush();

See Also

DeflaterOutputStream Class | DeflaterOutputStream Members | ICSharpCode.SharpZipLib.Zip.Compression.Streams Namespace