title: How do I get a TextBox to only accept numeric input in WPF?
body: <p>I'm looking to accept digits and the decimal point, but no sign.</p>
  
  <p>I've looked at samples using the NumericUpDown control for Windows Forms, and <a href="http://msdn.microsoft.com/en-us/library/ms771573.aspx" rel="noreferrer">this sample of a NumericUpDown custom control from Microsoft</a>. But so far it seems like NumericUpDown (supported by WPF or not) is not going to provide the functionality that I want. The way my application is designed, nobody in their right mind is going to want to mess with the arrows. They don't make any practical sense, in the context of my application.</p>
  
  <p>So I'm looking for a simple way to make a standard WPF TextBox accept only the characters that I want. Is this possible? Is it practical?</p>