C# If item is not in array

Question

I have an array with these 3 items:

string[] departmentArray = {
    "Warranty Service Representative",
    "Warranty Service Administrative Manager",
    "Warranty and Site Administrator"
};

and I have this string

var department = "Warranty Service Representative"

I have this condition that is suppose to test if the string department is not in the departmentArray

if (Array.Exists(departmentArray, element => element != department)){
}

Clearly the string is in the array, so it should return false, but this returns true for my string. What Am I doing wrong?

Answer 1

Wouldn't this be simpler?

string[] departmentArray = { 
    "Warranty Service Representative", 
    "Warranty Service Administrative Manager", 
    "Warranty and Site Administrator" };

String department = "Warranty Service Representative";

if (departmentArray.Contains(department) == false)
{
}