moras da koristis namespace FirebirdSql.Data.Firebird a ne SqlClient. Dakle za konekciju koristis objekat FbConnection.
Npr.
Code:
FirebirdSql.Data.Firebird.FbConnection fbconn = new FirebirdSql.Data.Firebird.FbConnection();
fbConn.ConnectionString = "User=SYSDBA;Password=masterkey;Database=C:\\TEST.GDB;DataSource=;
Port=3050;Dialect=3;Charset=NONE;Role=;Connection lifetime=0;
Connection timeout=15;Pooling=True;Packet Size=8192;Server Type=0";
za parametar Database ide fizicka putanja do fajla (baze).
Djankam se, kuzish.