MySql.Data.MySqlClient.MySqlConnection.ChangeDatabase C# (CSharp) Method

        public override void ChangeDatabase(string databaseName)
        {
            if (databaseName == null || databaseName.Trim().Length == 0)
                throw new ArgumentException(Resources.ParameterIsInvalid, "databaseName");

            if (State != ConnectionState.Open)
                throw new InvalidOperationException(Resources.ConnectionNotOpen);

            // This lock  prevents promotable transaction rollback to run
            // in parallel
            lock (driver)
            {
#if !CF
                if (Transaction.Current != null &&
                    Transaction.Current.TransactionInformation.Status == TransactionStatus.Aborted)
                {
                    throw new TransactionAbortedException();
                }
#endif
                // We use default command timeout for SetDatabase
                using (new CommandTimer(this, (int)Settings.DefaultCommandTimeout))
                {
                    driver.SetDatabase(databaseName);
                }
            }
            this.database = databaseName;
        }

        public void CanCreateDBScriptWithDateTimePrecision()
        {
            if (Version < new Version(5, 6, 5)) return;

             MySqlConnection c = new MySqlConnection(conn.ConnectionString);
             c.Open();

             var script = new MySqlScript(c);
             using (var ctx = new datesTypesEntities())
             {
               MySqlCommand query = new MySqlCommand("Create database test_types", c);
               query.Connection = c;
               query.ExecuteNonQuery();
               c.ChangeDatabase("test_types");

               script.Query = ctx.CreateDatabaseScript();
               script.Execute();

               query = new MySqlCommand("Select Column_name, Is_Nullable, Data_Type, DateTime_Precision from information_schema.Columns where table_schema ='" + c.Database + "' and table_name = 'Products' and column_name ='DateTimeWithPrecision'", c);
               query.Connection = c;
               MySqlDataReader reader = query.ExecuteReader();
               while (reader.Read())
               {
              Assert.AreEqual("DateTimeWithPrecision", reader[0].ToString());
              Assert.AreEqual("NO", reader[1].ToString());
              Assert.AreEqual("datetime", reader[2].ToString());
              Assert.AreEqual("3", reader[3].ToString());
               }
               reader.Close();
               ctx.DeleteDatabase();
               c.Close();
             }
        }