title: SecurityAttribute.Unrestricted issue
body: <p>I am confused about this property, as mentioned here, <a href="http://msdn.microsoft.com/en-us/library/system.security.permissions.securityattribute.unrestricted.aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/system.security.permissions.securityattribute.unrestricted.aspx</a> we could give it full or non-full.</p>
  
  <p>My confusion is for permission in a straightforward understanding, there should be only two status -- granted and not-granted, what does th full and non-full mean?</p>