- Làm thế này
Code:
do{
Console.WriteLine("Press 1 to add new item");
Console.WriteLine("Press 2 to delete item");
Console.WriteLine("Press 3 to list items");
Console.WriteLine("Press 4 to exit");
Console.WriteLine("-------------------------");
Console.WriteLine("choose a choice");
int choose = 0;
while(true){
string s = Console.ReadLine();
if(int.TryParse(s, out choose) == true)
if ( choose >0 && choose < 5) break;
Console.WriteLine( " Input fail ");
Console.WriteLine( " ReInput Please : ");
}
if(choose == 4) break;
//-- Làm việc
}
while( true);