C# quiz: write a valid C# program containing a sequence of three tokens
? null :that remains valid after we remove the
Note that the wording "three tokens" is important:
"? null :" is a single string literal token, and comments are not tokens.
Neither the tweet replies nor the blog comments contain an answer (nor do later tweets or blog posts). I googled and couldn't find any other discussion of the problem aside from those two sources. I wasted over an hour trying different things to no avail, although I suspect it has something to do with Nullable types and case statements or maybe statement labels.
This seems right up PCG's alley, so I'll award the check to the first submission that compiles in .Net 4.x (specify version) both with and without the