The author of the DotNetFirebird and FirebirdTutorial docs for users of the .NET providers, Dan Letecky, has closed down his websites and donated his marvellous collection of material to the Project. Dan also transferred the dotnetfirebird.org and firebirdtutorial.net domains to us so the good news is that, as from today, your old links to these materials will work, viz. http://[www.]dotnetfirebird.org and http://[www.]firebirdtutorial.net.

Of course, you can also get to them through internal links: dotnetfirebird and firebirdtutorial.