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

Why would you need yet another way? Since it isn't a matter of functionality, I would guess the point is to improve readability. If you have a few variables with meaningful names, it would be more readable to just compare by using ==. If you have more, you can use Contains against a list as in your other sample. Yet another way would be comparing against enum flags:

[Flags]
public enum Size
{
    Small = 1,
    Medium = 2,
    Large = 4
}

And then to find out if mySize is in Small or Medium:

selectedSizes = Size.Small | Size.Medium;
mySize = Size.Small;
if (mySize & selectedSizes)
{
  ... 
}