WPF Listbox and Select All
问题 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>