MaskedTextbox to accept only doubles

Hi, I added a few MaskedTextboxes to try to control user input, only to find a few more problems!

In a normal Textbox, whatever text the user inputs is the only input, but in a MaskedTextbox, the mask remains when validation starts. The problem is, spaces or invalid characters might remain and parsing for a double fails. Example:

Code:

Using: Mask = "00.0000" ValidationType = typeof(double) Convert.ToDouble(maskedTextbox.Text)

Input after selecting all text in the box:

Code:

Using: "1" --> Upon validation is parsed as "1_.____" --> which means it's "1 ." --> crash! "01" --> Upon validation is parsed as "01.____" --> which ends with "." --> crash! "010" --> Upon validation is parsed as "01.0___" --> OK.

For the first two, you get a formatting exception. Will I have to parse the whole string to check everything? Isn't that the point of having a MaskedTextbox?? I can't be asking the user to type extra zeros!

Should I go with a regular Textbox and use double.TryParse() ?

Also, I've noticed there is no exclusive mask for plus/minus symbols. I can only use "&" and that would allow the user to input an extra number. That's an easy check, but is there a shorter/better way?