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I want to create a simple ListBox and have SelectAll as a context menu item. However it seems that ListBox has some sort of inbuilt handling for SelectAll that I can't get working, but is interfering with my attempt to implement SelectAll. My entire XAML is this: <Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <Window.CommandBindings> <CommandBinding Command="ApplicationCommands.SelectAll" Executed="SelectAllExecuted" /> </Window.CommandBindings> <DockPanel> <CheckBox DockPanel.Dock="Top">My Checkbox</CheckBox> <ListBox Name="listBox" SelectionMode="Multiple"> <ListBox.ContextMenu> <ContextMenu> <MenuItem Command="ApplicationCommands.SelectAll" /> </ContextMenu> </ListBox.ContextMenu> </ListBox> </DockPanel> </Window> SelectAllExecuted is simply this: private void SelectAllExecuted(object sender, ExecutedRoutedEventArgs e) { listBox.SelectAll(); } Control+A works if the listbox isn't in focus. The context menu item works correctly. But Control+A refuses to work if the listbox is focused. I feel like I'm fighting against the listbox, but I shouldn't need to. Edit : It seems my entire problems are with the Multiple SelectionMode. If I set it to Extended then everything works, however I don't want it in extended mode.

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