BZip2.Compress Method 

[Visual Basic]
Public Shared Sub Compress( _
   ByVal instream As System.IO.Stream, _
   ByVal outstream As System.IO.Stream, _
   ByVal blockSize As Integer _
)

[C#]
public static void Compress(
   Stream instream,
   Stream outstream,
   int blockSize
);

See Also

BZip2 Class | BZip2 Members | ICSharpCode.SharpZipLib.BZip2 Namespace