public class Test {
	public static void Main(string[] args) {
		string connectionString = 
			"Database=C:\\PROGRAM FILES\\FIREBIRD\\EXAMPLES\\EMPLOYEE.GDB;" + 
			"User=SYSDBA;" + "Password=masterkey;" + 
			"Dialect=3;" + "Server=localhost";
 
		IDbConnection dbcon = new FbConnection(connectionString); 
		dbcon.Open(); 
		IDbCommand dbcmd = dbcon.CreateCommand(); 
		string sql = "SELECT * FROM employee"; 
		dbcmd.CommandText = sql; 
		IDataReader reader = dbcmd.ExecuteReader(); 
		while(reader.Read()) {
			object dataValue = reader.GetValue(0); 
			string sValue = dataValue.ToString(); 
			Console.WriteLine("Value: " + sValue);
		} 
 
		// clean up 
		reader.Close(); 
		reader = null; 
		dbcmd.Dispose(); 
		dbcmd = null; 
		dbcon.Close(); 
		dbcon = null;
	}
}

IDbCommand dbcmd = dbcon.CreateCommand();