title: WPF DataBinding with an conditional expression
body: <p>I am using MVVM pattern and my datacontext of my view is having a property Customer. Now I want to bind IsEnabled property of my textbox based on the value of Customer.CustomerID property. If it is greater than 0 then it should be enable else disable.</p>
  
  <p>I understand I could easily add a bool property in the view model and bind it to the IsEnabled property of my textbox but that seems to be an overkill.</p>