public class ChartData
		{
			public string Title { get; set; }
			public IList<IRenderableSeriesViewModel> SensorSeries { get; set; }
		}

public IReadOnlyList<ChartData> ChartsData { get; set; }



var trendCharts =from tr in step
		from st in tr.Statistics
		group new { Time = tr.RunStartTime.LocalDateTime, SensorName = st.Key, Value = st.Value }
		by st.Key into stat
		select new ChartData
		{
			Title = stat.Key,
			SensorSeries = stat
			.Select(SensorData =>
			{
				var series = new XyDataSeries<DateTime, double>
				{
				    SeriesName = SensorData.SensorName
				};

				series.Append(
				stat.Select(rs => rs.Time),
				stat.Select(rs => rs.Value));

				return new LineRenderableSeriesViewModel
				{
					DataSeries = series,
					StyleKey = $"TrendLineStyle",
				};
			}).ToArray(),
		};

				ChartsData = trendCharts.OrderBy(s => s.Title).ToList();