title: WPF MVVM - How to detect if a View is "Dirty"
body: <p>I currently have a requirement to notify my application user if any fields have been changed/updated on a View.</p>
  
  <p>For example, if the user changes a date field on the View and then tries to close the View, the application would display a message asking the user to Continue and lose changes or Cancel so that they can click the Save button.</p>
  
  <p>Problem is: How do I detect that any of the data fields changed in the View?</p>
  
  <p>Hope this makes sense, than you in advance, regards,</p>