WPF MaskedTextBox value binding (binding without the mask)

Question

This is my masked textbox from the WPF Extended Toolkit

<xctk:MaskedTextBox Mask="(000) 000-0000" Value="{Binding Number, UpdateSourceTrigger=PropertyChanged}" />

The binding back to the property is including the mask. For example, when I enter 9991114444, the Number property is set to (999) 111-4444. What I need, however, is just the value without the mask (9991114444). Can I accomplish that with the MaskedTextBox?

The number property is basic string property:

public string Number { get; set; }

Answer 1

I believe you can just add

IncludeLiterals="False"