Version Used:
VS 15.5.0
Steps to Reproduce:
Span<byte> s = stac...Expected Behavior:
C# 7.2 introduce safe stackalloc with the Span<T> struct. So stackalloc keyword should be listed in the IntelliSense window.
Actual Behavior:

FYI @OmarTawfik (in case you want to take a look)
Code for this is in StackAllocKeywordRecommender.cs