> > Interesting :/ I will investigate if Firebird is expecting some sort of
> > end of file mark.
>
> For backup or restore?

Anyway. You can have a look at
https://github.com/cincuranet/FirebirdSql.Data.FirebirdClient/blob/master/NETProvider/src/FirebirdSql.Data.FirebirdClient/Services/FbStreamingBackup.cs
(or FbStreamingRestore.cs). It was quite some fiddling before I got it
right.

--
Mgr. Jiří Činčura
Independent IT Specialist