wpftoolkit图表上的水平线

Question

我正在使用WPF工具包创建折线图。

这就是我正在做的事情：

<Window x:Class="TempDataAnalyzer.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525" xmlns:chartingToolkit="clr-namespace:System.Windows.Controls.DataVisualization.Charting;assembly=System.Windows.Controls.DataVisualization.Toolkit" Loaded="Window_Loaded">
<Grid>
     <chartingToolkit:Chart  Name="lineChart" Title="Temperature" VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
        <chartingToolkit:LineSeries  DependentValuePath="Value" IndependentValuePath="Key" ItemsSource="{Binding}" IsSelectionEnabled="True"/>
     </chartingToolkit:Chart>
</Grid>
</Window>


public partial class MainWindow : Window
{
    public MainWindow()
    {
      InitializeComponent();
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        List<KeyValuePair<int, int>> entries = new List<KeyValuePair<int, int>>();
        entries.Add(new KeyValuePair<int, int>(0, 0));
        entries.Add(new KeyValuePair<int, int>(1, 23));
        entries.Add(new KeyValuePair<int, int>(2, 45));
        entries.Add(new KeyValuePair<int, int>(3, 46));
        entries.Add(new KeyValuePair<int, int>(4, 71));

        lineChart.DataContext = entries;
    }
}

这个问题已经被问到了，但我不明白答案，有人可以给我一个例子吗