In wpf oxyplot, is there a way to make only the clicked item visible when the legend item is clicked?

Question

I made an oxyplot with wpf as below. If I click the line1 legend below, line1 will be invisible.
In addition to this function, I want to show only line1 when a specific key is pressed (ex. ctrl+mouse left btn) and hide the rest of the legend items.
But I'm not sure about the legend click event.
Can anyone help me? I am attaching my code and picture description.

xaml  
  
<Window x:Class="oxyplot_sample.MainWindow"  
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  
        xmlns:local="clr-namespace:oxyplot_sample"  
        mc:Ignorable="d"  
        xmlns:oxy="http://oxyplot.org/wpf"  
        Title="MainWindow" Height="450" Width="800">  
    <Grid>  
        <oxy:PlotView Model="{Binding plotmodel}" Margin="10 10 10 10"/>  
    </Grid>  
</Window>  


cs  
  
namespace oxyplot_sample  
{  
    /// <summary>  
    /// Interaction logic for MainWindow.xaml  
    /// </summary>  
    public partial class MainWindow : Window  
    {  
  
        public PlotModel plotmodel { get; set; }  
  
        public MainWindow()  
        {  
            InitializeComponent();  
                          
            plotmodel = new PlotModel();              
              
            var line1 = new LineSeries() { Title="line1"};  
            var line2 = new LineSeries() { Title="line2"};  
            var line3 = new LineSeries() { Title="line3"};  
  
            for (int i=0; i<10; i++)  
            {  
                line1.Points.Add(new DataPoint(i, i));  
                line2.Points.Add(new DataPoint(i, i + 1));  
                line3.Points.Add(new DataPoint(i, i + 2));  
            }              
  
            plotmodel.Series.Add(line1);  
            plotmodel.Series.Add(line2);  
            plotmodel.Series.Add(line3);  
            plotmodel.Legends.Add(new Legend()  
            {  
                LegendPosition = LegendPosition.TopCenter,  
                LegendFontSize = 15  
            }) ;  
  
            plotmodel.Axes.Add(new LinearAxis { Position = AxisPosition.Left});  
            this.DataContext = this;  
              
        }  
  
          
    }  
}