C#. Do if( a == (b or c or d)). Is it possible?

Question

Is there another way to write something like this:

if (a == x || a == y || a == z)

One way that I found is doing it like this:

Answer 1

Your solution to rewrite it as

if( new [] {x,y,z}.Contains(a))

is not a good move.

You've take a simple efficient logical operation, which every programmer easily understands and which contains short-circuiting logic to speed it up and instead you've produced code that requires a moment to understand and which is considerably less efficient.

Sometimes your fellow engineers will prefer it if you don't try to be "clever"!