How do i say is not, is not

i don't want to say:

(trsaz != v1) && (trsaz != v2) && ...

i want something like:

trsaz != (v1, v4, v7, v11)

Is this possible o开发者_运维百科r is there also something else besides !=.

var badList = new[] { v1, v4, v7, v11 };
var result = !badList.Contains(trsaz);

var excludeList = new[] { "v1", "v4", "v7", "v11" };
if(!excludeList.Contains(trsaz))
{
    ...
}

Actually, I prefer creating a little extension method for that:

public static bool IsIn<T>(this T obj, params T[] set) {
    return set.Any(el => element.Equals(obj));        
}

It encapsulates all the black magic and makes your code really concise which is your goal, obviously:

if (!trsaz.IsIn(v1, v4, v7, v11)) {
    // ...
}

It's always good to hide the mechanism if it's not important, especially in this case where the use of any mechanism is not necessary at all and will confuse some people who will maintain your code.

var result = (new[] {v1, v4, v7}).Every(o => o != trsaz);