CSDataBase.cDataBase.createConnection C# (CSharp) Method

        private DbConnection createConnection()
        {
            switch (m_databaseEngine)
            { 
                case csDatabaseEngine.SQL_SERVER:
                    return new SqlConnection();
                case csDatabaseEngine.POSTGRESQL:
                    throw new NotImplementedException();
                case csDatabaseEngine.ORACLE:
                    return new OracleConnection();
                case csDatabaseEngine.CSREPORT_WEB:
                    return new cJSONServerConnection();
            }
            throw new Exception("The database engine is not supported " + m_databaseEngine.ToString());
        }