添加项目文件。

Live-Charts-master/Examples/Wpf/CartesianChart/Missing Line Points/MissingPointsExample.xaml

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+<UserControl x:Class="Wpf.CartesianChart.Missing_Line_Points.MissingPointsExample"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"
+             mc:Ignorable="d" 
+             d:DesignHeight="300" d:DesignWidth="300">
+    <Grid>
+        <lvc:CartesianChart Series="{Binding Series}">
+        </lvc:CartesianChart> 
+    </Grid>
+</UserControl>

Live-Charts-master/Examples/Wpf/CartesianChart/Missing Line Points/MissingPointsExample.xaml.cs

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+using System.Windows.Controls;
+using LiveCharts;
+using LiveCharts.Wpf;
+
+namespace Wpf.CartesianChart.Missing_Line_Points
+{
+    public partial class MissingPointsExample : UserControl
+    {
+        public MissingPointsExample()
+        {
+            InitializeComponent();
+
+            Series = new SeriesCollection
+            {
+                new LineSeries
+                {
+                    Values = new ChartValues<double>
+                    {
+                        4,
+                        5,
+                        7,
+                        8,
+                        double.NaN,
+                        5,
+                        2,
+                        8,
+                        double.NaN,
+                        6,
+                        2
+                    }
+                }
+            };
+
+            DataContext = this;
+        }
+
+        public SeriesCollection Series { get; set; }
+
+    }
+}