title: WPF Data Binding and Validation Rules Best Practices
body: <p>I have a very simple WPF application in which I am using data binding to allow editing of some custom CLR objects. I am now wanting to put some input validation in when the user clicks save. However, all the WPF books I have read don't really devote any space to this issue. I see that you can create custom ValidationRules, but I am wondering if this would be overkill for my needs.</p>
  
  <p>So my question is this: is there a good sample application or article somewhere that demonstrates best practice for validating user input in WPF?</p>