How can a cBot tell what version of cTrader it is running on (so, for instance, it can avoid attempting v5-only features if not available)?

Is there a property or method a cBot can use that returns the cTrader version and/or environment, possibly a bit like RunningMode but with other info.

Also, how do we tell from the reference documentation which features are only v5, for instance these both seem not to be available in 4.9.2 (which was the current version from IC Markets only a month or 2 ago): ChartIndicators.Add & Chart.Indicators.Add - and btw which of the 2 is preferred, they both are documented…

https://help.ctrader.com/ctrader-algo/guides/chart-indicators/   
You can easily add any indicator that you have access to by calling the following method.
ChartIndicator ChartIndicators.Add(string name, params object[] parameterValues)
also on https://help.ctrader.com/ctrader-algo/references/Chart/Indicators/ChartIndicators/#add

vs

https://help.ctrader.com/ctrader-algo/articles/for-developers/how-to-manage-cbots-and-indicators-using-algos/#add-an-indicator-using-a-cbot
Define two indicators.
ChartIndicator _indicator1;
ChartIndicator _indicator2;
Add two indicators to the chart.
_indicator1 = Chart.Indicators.Add("Simple Moving Average", SourceSeries, FastPeriods, MAType);
_indicator2 = Chart.Indicators.Add("Simple Moving Average", SourceSeries, SlowPeriods, MAType);

Thanks.