title: Disabling checkbox checking in WPF
body: <p>I want to make impossible checking <i>checkbox</i> in WPF (from C# code). Only unchecking would be allowed. 
  <br />How can I do it?</p>
  
  <p><strong>PS</strong>.<br />Writing event handler on <i>Click event</i> which would immediately uncheck checkbox after checking it is not acceptable.</p>
  
  <p><strong>[edit]</strong><br />Checkbox should always be enabled, so that user can think that checkbox can be checked. It's strange but it's specific programme.</p>