C#Switch语句重构

int dayOfWeek = 3;

switch (dayOfWeek)
{
    case 0:
        Console.WriteLine("Sunday");
        break;
    case 1:
        Console.WriteLine("Monday");
        break;
    case 2:
        Console.WriteLine("Tuesday");
        break;
    case 3:
        Console.WriteLine("Wednesday");
        break;
    case 4:
        Console.WriteLine("Thursday");
        break;
    case 5:
        Console.WriteLine("Friday");
        break;
    case 6:
        Console.WriteLine("Saturday");
        break;
    default:
        Console.WriteLine("Invalid day");
        break;
}

int dayOfWeek = 3;

Dictionary<int, string> dayOfWeekDict = new Dictionary<int, string>
{
    { 0, "Sunday" },
    { 1, "Monday" },
    { 2, "Tuesday" },
    { 3, "Wednesday" },
    { 4, "Thursday" },
    { 5, "Friday" },
    { 6, "Saturday" }
};

if (dayOfWeekDict.TryGetValue(dayOfWeek, out string day))
{
    Console.WriteLine(day);
}
else
{
    Console.WriteLine("Invalid day");
}