Firebird ADO.NET Data Provider Connection Strings

Firebird

Standard

User=SYSDBA;Password=masterkey;Database=SampleDatabase.fdb;DataSource=localhost;Port=3050;Dialect=3;Charset=NONE;Role=;Connection lifetime=15;Pooling=true;MinPoolSize=0;MaxPoolSize=50;Packet Size=8192;
ServerType=0;

Using the Firebird embedded server

User=SYSDBA;Password=masterkey;Database=SampleDatabase.fdb;DataSource=localhost;Port=3050;Dialect=3;Charset=NONE;Role=;Connection lifetime=15;Pooling=true;MinPoolSize=0;MaxPoolSize=50;Packet Size=8192;
ServerType=1;

It's the key/value ServerType=1; that tells the driver it's in embedded mode.

Disable pooling

User=SYSDBA;Password=masterkey;Database=SampleDatabase.fdb;DataSource=localhost; Port=3050;Dialect=3;Charset=NONE;Role=;Connection lifetime=15;Pooling=false; Packet Size=8192;ServerType=0;