I'm trying to implement my own markup extension, it would be something that could be used to pass two values to a property like:
{Foo Value1={x:Null} Value2={x:Null}}
I've looked into some websites and there is always someone saying something about extending the MarkupExtension class. I've tried to do the same within a Windows Phone 8.1 project and this class doesn't seen to be available. Can someone point me to the right direction? What should I do to implement something like that? There is a better alternative to extending the MarkupExtension class?
Thanks in advance.