添加项目文件。

Live-Charts-master/Examples/WinForms/Cartesian/StepLine/StepLineExample.cs

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+using System.Windows.Forms;
+using System.Windows.Media;
+using LiveCharts;
+using LiveCharts.Wpf;
+
+namespace Winforms.Cartesian.StepLine
+{
+    public partial class StepLineExample : Form
+    {
+        public StepLineExample()
+        {
+            InitializeComponent();
+
+            cartesianChart1.Series.Add(new StepLineSeries
+            {
+                Values = new ChartValues<double> { 9, 6, 5, 7, 8, 9, 7, 6, 7, 5 }
+            });
+
+            cartesianChart1.Series.Add(new StepLineSeries
+            {
+                Values = new ChartValues<double> {1, 4, 3, 1, 4, 2, 1, 2, 3, 5},
+                AlternativeStroke = Brushes.Transparent,
+                StrokeThickness = 3,
+                PointGeometry = null
+            });
+        }
+    }
+}