Use InputBinding to bind Application commends to Key events

   
  


<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="CommandBasics" Height="300" Width="300">
  <Grid>
    <Button Command="ApplicationCommands.Properties" Content="_Properties"/>
  </Grid>

</Window>

//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Text;
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.Shapes;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {

        public Window1()
        {
            InitializeComponent();

            InputBinding ib = new InputBinding(ApplicationCommands.Properties,new KeyGesture(Key.Enter, ModifierKeys.Alt));
            this.InputBindings.Add(ib);
            CommandBinding cb = new CommandBinding(ApplicationCommands.Properties);
            cb.Executed += new ExecutedRoutedEventHandler(cb_Executed);
            this.CommandBindings.Add(cb);

        }

        void cb_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Properties");
        }
    }
}