WPF C#

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Event Examples" Height="300" Width="300">
  
    
  

//File:Window.xaml.cs
using System;
using System.Windows;
using System.Diagnostics;
using System.Windows.Shapes;
using System.Windows.Input;
namespace WpfApplication1
{
    public partial class AttachedEvents : System.Windows.Window
    {
        public AttachedEvents()
        {
            InitializeComponent();
        }
        void PreviewMouseDownGrid(
          object sender, RoutedEventArgs e)
        { Debug.WriteLine("PreviewMouseDownGrid"); }
        void MouseDownGrid(object sender, RoutedEventArgs e)
        { Debug.WriteLine("MouseDownGrid"); }
    }
}