string[] users = new String[] { "Admin", "Admin", "Manager", "Manager", "User" };
int[] levels = new int[] { 56, 55, 21, 19, 100 };
int counter = 0;

foreach (string user in users) {
    int level = levels[counter++];
    switch (user) {
        case "Admin":
            Console.WriteLine($"Wellcome, {(level > 55 ? "Super " : "")}Admin user.");
            break;
        case "Manager":
            if (level >= 20) {
                Console.WriteLine("Contact an Admin for access.");
            } else {
                Console.WriteLine("You do not have sufficient privileges.");
            }
            break;
        default:
            Console.WriteLine("You do not have sufficient privileges.");
            break;
    }
}