Xaml specified C++ class member variables

[bongvisu]

As far as I know, it's not recommended to name an identifier with a leading underscore, but I see
WinUI C++/WinRT code-behind class variable names start with a leading underscore.
Wouldn't it rather be better to use a trailing underscore?

[wjk]

According to the inestimable Raymond Chen, leading underscores are permitted in C++ identifiers if the next letter is lowercase. (Also, I neither quite got the practice of putting trailing underscores on instance variables. To me it looks really weird and sticks out like a sore thumb when read. I would rather use no underscore at all.)