I've implemented Matthew MacDonald's MaskedTextbox control, from his book, "Pro WPF in C# 2008". It works fine, with one or 2 exceptions. One of them is that when a user selects all of the contents in the textbox, they're used to hitting the
delete key and that clearly everything out, so they can type over it. For example, I've got a mask of "000000" for one of the boxes. The users are used to selecting all 6 digits and then hitting the delete key and having that clear it out.
But this doesn't work that way. Instead what they have to do is go to the end of the 6 digits and then hit the backspace kery 6 times. That isn't anywhere near convenient as the old MaskTextBox in WinForms. What can I do to make get this
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