Hello,
i have recently tried to use the Seek() method from the SecureStream, but it is apparently not implemented, since it throws a NotSupportedException. Is there any possibility it will be included in future releases?

What exactly would the Seek method do on a SecureNetworkStream?
Like the System.Net.NetworkStream, you cannot use the seek method of the SecureNetworkStream due to the fact that a Socket doesn't support random access, only sequential access.

Trying to use the mentalis lib with Npgsql driver. And get an unhandled exception of type 'System.NotSupportedException' occurred in org.mentalis.security.dll when trying to open the database connection.
I can see it connected to the server but it throws the exception at the point when reading data.

The following call sequence might help.

internal sealed class NpgsqlQuery{
.....
public void WriteToStream( Stream outputStream, Encoding encoding ){
outputStream.WriteByte((Byte)'Q');
....
}}

-----------------------------------------

namespace Org.Mentalis.Security.Ssl {

public class SecureNetworkStream : Stream {
........
public override long Seek(long offset, SeekOrigin origin) {
throw new NotSupportedException();
}
........
}

If Npgsql uses the SecureNetworkStream.Seek method, then it's normal that a NotSupportedException occurs. Seek is not supported and will not be supported in the future. It's not a bug, but a design decision. The reason why it's not implemented is because a socket (unlike a file, for instance) does not support random access.

The outputStream.WriteByte method does not use the Seek method, so it's unlikely that the error occurred from that call.