There is some kind of errors, which you can easily fix by edit (or move) only one line of code. My last error is one of them. I don’t remember when I made it, because I can’t recall a birthday of my last line written by hand). Ok, not completely by hand, because I used snippet “propdp”, which are used to generate properties, which we can use from XAML level for example. This snippet before edition looks like this (after double tab):