public override void Write(byte[] pbBuffer, int nOffset, int nCount)
{
if(!m_bWriting) throw new InvalidOperationException();
#if DEBUG
byte[] pbOrg = new byte[pbBuffer.Length];
Array.Copy(pbBuffer, pbOrg, pbBuffer.Length);
#endif
if((m_hash != null) && (nCount > 0))
m_hash.TransformBlock(pbBuffer, nOffset, nCount, pbBuffer, nOffset);
#if DEBUG
Debug.Assert(MemUtil.ArraysEqual(pbBuffer, pbOrg));
#endif
m_sBaseStream.Write(pbBuffer, nOffset, nCount);
}