How to connect and use Firebird db embedded server with Visual C# 2010


I was trying to use Firebird embedded server with Microsoft Visual C# 2010. so here is what I done till now:

  1. Downloaded Firebird .Net Data Provider (Firebird Client v2.5.2).

  2. Downloaded Firebird Embedded server (Firebird Embedded Server v2.5.0).

  3. Added a reference to FirebirdSql.Data.FirebirdClient.dll to my project.

  4. Extracted and Copied fbembed.dll file to my application's directory.

  5. Added my FDB file "TEST.FDB" to my application's directory.

  6. Added "using FirebirdSql.Data.FirebirdClient;" statement.

So far so good (I suppose)...

Now when I try to connect to my FDB file using the following code:

    FbConnection con = new FbConnection("User=SYSDBA;" + "Password=masterkey;" + "Database=TEST.FDB;" + "DataSource=;" + "Port=3050;" + "Dialect=3;" + "Charset=UTF8;");
    try  {
    catch (Exception ex) 

I always get the messagebox which means the code is not connecting to my DB file properly. am I doing something wrong? I'm really still noob with C# and I have no idea how to do this or fix it and I hope someone will help me with this.

thanks :)

EDIT: here is what I get in the exception:

FirebirdSql.Data.FirebirdClient.FbException (0x80004005): Unable to complete network request to host "". ---> Unable to complete network request to host "". at FirebirdSql.Data.FirebirdClient.FbConnectionInternal.Connect() at FirebirdSql.Data.FirebirdClient.FbConnectionPool.Create() at FirebirdSql.Data.FirebirdClient.FbConnectionPool.CheckOut() at FirebirdSql.Data.FirebirdClient.FbConnection.Open() at fbTestApp.Form1.button1_Click(Object sender, EventArgs e) in C:\Documents and Settings\ermac\My Documents\Visual Studio 2010\Projects\fbTestApp\fbTestApp\Form1.cs:line 25

asked on Stack Overflow Oct 25, 2010 by SolidSnake • edited Sep 17, 2019 by Mark Rotteveel

4 Answers


I finally I found the solution after 6 hours of work :)

most of answers on google are either wrong or so old. all of them say that I only need to include fbembed.dll file to my project..

after some investigations I made. I found that I also need to add firebird.msg, firebird.conf, icudt30.dll, icuin30.dll, icuuc30.dll and ib_util.dll to my project files and to the output folder..

important notice: never use compact .Net data provider. because they made it for Normal and super firebird servers only. it won't work with embedded servers.

answered on Stack Overflow Oct 25, 2010 by SolidSnake

With Firebird 2.5 embedded, I copy all this files to the application directory :

aliases.conf (optional)
Microsoft.VC80.CRT.manifest  : -- Not sure if this 3 files are necessary
msvcp80.dll                  : -- but i copy them :)
msvcr80.dll                  : -- see
intl\fbintl.conf   : Without those files you can't use
intl\fbintl.dll    : all charset and collations
udf\*  : if you want to use pre-build UDF

In the connection string, I specify that the server is embedded wih serverType=1:


I forgot also IDPLicense.txt and IPLicense.txt, I think we have to also distribute them with the application for license issue ?

answered on Stack Overflow Oct 25, 2010 by PlageMan • edited Oct 25, 2010 by PlageMan

I put the Firebird DLLs in a dir in the project called Firebird. Added a Post Build event to copy the files.

copy $(ProjectDir)Firebird\*.dll $(ProjectDir)$(OutDir)*.dll"
answered on Stack Overflow Jul 28, 2012 by bill • edited Jul 28, 2012 by Tisho

These are the files and distribution you need for Firebird 3.0.5:

- root\plugins\engine12.dll

- root\intl\fbintl.conf
- root\intl\fbintl.dll

- root\fbclient.dll
- root\icudt52.dll
- root\icudt52l.dat
- root\icuuc52.dll

I check them out at the beginning of my application so I can inform what can go wrong.

answered on Stack Overflow Jun 7, 2020 by Carlos Alberto Flores Onofre • edited Jun 7, 2020 by Carlos Alberto Flores Onofre

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