I've been working with Build 10 today and noticed that if I start an
expression with an opening parenthesis, such such a cast, IntelliSense pops
up but it doesn't highlight any matches. To reproduce this, enter a
statement such as one of these:
var x = (stringbuilder) some_variable;
In both cases, IntelliSense positions to StringBuilder in the list but
nothing is highlighted and the statement isn't completed so you end up with
stringbuilder in all lowercase.