Is this pattern matching expression equivalent to not null

Question

I stumbled upon this code on github:

if (requestHeaders is {})

and I don\'t understand what it does exactly.

Upon experimenting it\'s s

Answer 1

you should be able to do like below..

Input : str  = null         // initialize by null value
        String.IsNullOrEmpty(str)
Output: True

Input : str  = String.Empty  // initialize by empty value
        String.IsNullOrEmpty(str)
Output: True

So based on True false you can get results.