سلام
به این شکل اصلاح کنید
string[] daysOfWeek = new string[7];
daysOfWeek[0] = "Sunday";
daysOfWeek[1] = "Monday";
daysOfWeek[2] = "Tuesday";
daysOfWeek[3] = "Wednesday";
daysOfWeek[4] = "thursday";
daysOfWeek[5] = "Friday";
daysOfWeek[6] = "Saturday";
while (true)
{
Console.Clear();
Console.Write("Pick out a number bitween 1 and 7 or press q to quit: ");
string input = Console.ReadLine();
if (input != null && input.ToLower() == "q")
break;
int index;
if (!int.TryParse(input, out index)) continue;
if (index >= 1 && index <= 7)
{
Console.WriteLine(daysOfWeek[index - 1]);
}
else
{
Console.WriteLine("Invalid input!");
}
}
ضمنا اون Console.Clear که گذاشتید اجازه نمیده نتیجه رو ببینید.
موفق باشید.