title: How to Force only numeric values be allowed in maskedtextbox?
body: <p>I am fairly new to Winforms, and I would like to know how to use a MaskedTextBox to ensure that only numerical values(decimals included) are entered by the user.  </p>
  
  <p>I have tried the masked feature using "/^[-+]?[0-9]+(.[0-9]+)?$/" and was not successful with that. What I want, even if with an ordinary textbox, is to allow only numerals/decimal values </p>