Shorthand conditional in C# similar to SQL 'in' keyword

Question

In C# is there a shorthand way to write this:

public static bool IsAllowed(int userID)
{
    return (userID == Personnel.JohnDoe || userID == Personnel.JaneD         


        

Answer 1

Can you write an iterator for Personnel.

public static bool IsAllowed(int userID)
{
    return (Personnel.Contains(userID))
}

public bool Contains(int userID) : extends Personnel (i think that is how it is written)
{
    foreach (int id in Personnel)
        if (id == userid)
            return true;
    return false;
}