How do I Radom all the items in the listbox? [C# XAML Windows Store App]

I don't want to random number, I want to random all the items in the listbox in C# XAML Windows Store App??

Anyone have code for that or have any idea how to do that?

i have this code of listbox

<ListBox Name="Playlist" Background="White" DoubleTapped="Playlist_DoubleTapped" KeyUp="Playlist_KeyUp"
                 Foreground="Black" SelectionMode="Single" SelectionChanged="Playlist_SelectionChanged"
                 ScrollViewer.VerticalScrollMode="Enabled" ScrollViewer.VerticalScrollBarVisibility="Auto" Grid.Column="0" Margin="28,82,1067,32">

please help me..