AcessoDados.EngineFactory.CriarConnection C# (CSharp) Метод

        public IDbConnection CriarConnection(string connectionString)
        {
            switch (this.banco)
            {
                case Banco.SQLSERVER:
                    dbConnection = new SqlConnection(connectionString);
                    break;
                case Banco.ORACLE:
                   // dbConnection = new OracleConnection(connectionString);
                    dbConnection = new SqlConnection(connectionString);
                    break;
                default:
                    break;
            }

            return dbConnection;
        }

 /// <summary>
 /// Define as configuraçoes basicas do objeto
 /// </summary>
 public Engine(string str, Banco banco)
 {
     factory = new EngineFactory(banco);
     connectionString = factory.DecriptaString(str);
     dbCommand = factory.CriarCommand();
     dbConnection = factory.CriarConnection(connectionString);
 }