30         public override long Seek(
long offset, SeekOrigin origin)
    32             throw new NotSupportedException();
    37             throw new NotSupportedException();
    40         public override void Write(
byte[] buffer, 
int offset, 
int count)
    42             throw new NotSupportedException();
    62             get { 
throw new NotSupportedException(); }
    63             set { 
throw new NotSupportedException(); }