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Thank you for your enquiry. Yes, I’m afraid you will always need to use XyDataSeries.
From our article What is a RenderableSeries and What is a DataSeries
Q: What is a DataSeries?
SciChart separates out the data from the presentation by providing RenderableSeries and DataSeries. The DataSeries are optimized data structures that hold the arrays you are going to draw in SciChart.
Q: Why do we require that you use DataSeries?
Many WPF charts allow you to bind your chart to any data, for instance, an IEnumerable, or ObservableCollection. This is great for flexibility but not so great for speed! Our DataSeries are highly optimized data-structures for indexing, searching and iterating over data, enabling SciChart to achieve its record performance!
I hope this helps!
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