WPF XAML content with special character

XAML markup uses the same character entities and escape sequences as defined in XML

    &  for  & (ampersand)
    &lt;       for  < (less-than sign)
    &gt;      for  > (greater-than sign)
    &quot;  for  "  (quotation mark)
    &apos;  for  '  (apostrophe)


sources: http://msdn.microsoft.com/en-us/library/ms748250.aspx