public void CanAddElement() { var chart = new Chart(); var ds = new ChartDataset(); var tt = new ChartSet(); var tl = new ChartTrendLine(); var tl2 = new ChartTrendLine(); var tls = new ChartTrendLines(); tl2.SetParentElement(tls); tt.SetParentElement(ds); chart.Add(ds).Add(tt).Add(tl).Add(tl2); Assert.AreEqual(1, chart.Datasets.Children.Count); Assert.AreEqual(1, chart.Datasets.Children.First().Children.Count); Assert.AreEqual(1, chart.TrendLines.Children.Count); }