Why can't I select a null value in a ComboBox?

Question

In WPF, it seems to be impossible to select (with the mouse) a \"null\" value from a ComboBox. Edit To clarify, this is .NET 3.5 SP1.

Here\'s some c

Answer 1

I got a new solution for this question. "USING Mahapps"

  xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"


  

You can use the close button to clear the content.

Thanks.