2. Weekend or Working day

string dayOfWeek = Console.ReadLine();

//Monday -> Working day
//Tuesday -> Working day
//Wednesday -> Working day
//Thursday -> Working day
//Friday -> Working day
//Saturday -> Weekend
//Sunday -> Weekend
//other -> Error

//8 еднотипни проверки за точни стойности
switch (dayOfWeek)
{
    case "Monday":
    case "Tuesday":
    case "Wednesday":
    case "Thursday":
    case "Friday":
        Console.WriteLine("Working day");
        break;
    case "Saturday":
    case "Sunday":
        Console.WriteLine("Weekend");
        break;
    default:
        Console.WriteLine("Error");
        break;
}