lhofinger wrote:

Could it be a feature request?

OK, I have added it to the tracker:
Issue 1738 – Stream interface in .NET assembly
You can vote for it there.

martin wrote:

It is. You need to set EncryptKeyPlain raw session setting:
https://winscp.net/eng/docs/rawsettings#encryptkeyplain

Great

martin wrote:

No it is not possible.

Could it be a feature request?

lhofinger wrote:

Is it possible to use the new encryption feature?

It is. You need to set EncryptKeyPlain raw session setting:
https://winscp.net/eng/docs/rawsettings#encryptkeyplain

WinSCP GUI can generate a code template for you:
https://winscp.net/eng/docs/ui_generateurl#code

Is it possible to get/put one file to/from a Stream (instead of a local file on disk)? (I would like to put a file from a database without writing it first on disk).

No it is not possible.
EDIT 2022: It's possible now:
https://winscp.net/eng/docs/library_session_getfile
https://winscp.net/eng/docs/library_session_putfile

Hello Martin,
I've two questions about the .NET assembly :

1. Is it possible to use the new encryption feature?
   
2. Is it possible to get/put one file to/from a Stream (instead of a local file on disk)? (I would like to put a file from a database without writing it first on disk).
   

Regards,
Laurent