string permission = "Admin|Manager";
int level = 53;

if (permission.Contains("Admin")) {
    if (level > 55) {
        Console.WriteLine("Welcome, Super Admin user.");
    } else {
        Console.WriteLine("Welcome, Admin user.");
    }
} else if (permission.Contains("Manager")) {
    if (level >= 20) {
        Console.WriteLine("Contact an Admin for access.");
    } else {
        Console.WriteLine("You do not have sufficient privileges.");
    }
} else {
    Console.WriteLine("You do not have sufficient privileges.");
}