title: Disable Hyperlink in DatagridHyperlinkColumn
body: <p>I have a WPF Data grid which is bound to a list of custom class objects using the ItemsSource Property. 
  Grid has a DataGridHyperlinkColum that is bind to a property/field in custom class.
  I want this hyperlink to be disabled when another property in the custom class has a specific value. How can I achieve this?</p>