I needed to implement the abstract member.
[Visual Basic]
Overrides Public Function Read( _
ByVal b As Byte(), _
ByVal off As Integer, _
ByVal len As Integer _
) As Integer
[C#]
public override int Read(
byte[] b,
int off,
int len
);
See Also
DeflaterOutputStream Class | DeflaterOutputStream Members | ICSharpCode.SharpZipLib.Zip.Compression.Streams Namespace