WPF pass event method to viewmodel via behavior:CallMethodAction,TargetObject MethodName

1.Install Microsoft.Xaml.Behaviors.Wpf from Nuget;

2.Add reference of behavior in view 

3.Pass the event to the method located in viewmodel via behavior:EventTrigger,EventName,CallMethodAction,TargetObject,

//xaml
<Window x:Class="WpfApp74.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:behavior="http://schemas.microsoft.com/xaml/behaviors"
        xmlns:local="clr-namespace:WpfApp74" 
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <StackPanel> 
        <TextBlock Text="{Binding Num,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" FontSize="30"/>
        <Button Content="IncrementNum">
            <behavior:Interaction.Triggers>
                <behavior:EventTrigger EventName="Click">
                    <behavior:CallMethodAction TargetObject="{Binding}" MethodName="OnInCrementNum"/>
                </behavior:EventTrigger>
            </behavior:Interaction.Triggers>
        </Button>
    </StackPanel>
</Window>


//cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp74
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            var vm = new ViewModel();
            this.DataContext = vm;
        }
    }

    //Microsoft.Xaml.Behaviors.Wpf
    public class ViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        public void OnPropertyChanged(string propertyName)
        {
            var handler = PropertyChanged;
            if(handler!=null)
            {
                handler?.Invoke(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        private int num = 100;
        public int Num
        {
            get
            {
                return num;
            }
            set
            {
                if (value != num)
                {
                    num = value;
                    OnPropertyChanged(nameof(Num));
                }
            }
        }

        public void OnInCrementNum(object sender,RoutedEventArgs e)
        {
            Num++;
        }
    }
}