Embed code in XAML

Loads of time I needed a converter that does a very small operation such as binding to the Height of an element and subtract 10 from the binded value. Every time you have to create a converter to do so. I must admit, it really makes me angry because I would like to this in XAML. I found this cool code sample on Dynamic Expression API from msdn and I thought why don’t I use it to be able to embed code in XAML….