static int id_input()
{
int res;
console_color_1();
Console.WriteLine("Enter id of order:");
string input = Console.ReadLine();
while (!Validation1.check_if_int(input) || Convert.ToInt32(input) < 1)
{
Console.WriteLine("Reenter id of order. It must be a natural number.");
input = Console.ReadLine();
}
console_color_2();
res = Convert.ToInt32(input);
return(res);
}
static int menu()
{
int res;
console_color_1();
Console.WriteLine("YOU ARE NOW IN MAIN MENU");
Console.WriteLine("ENTER YOIR CHOICE:");
console_color_2();
Console.WriteLine("1 - search some data through all info\n" +
"2 - sort collection by some argument\n" +
"3 - delete any order(by its id) and rewrite collection in file\n" +
"4 - add an order and rewrite collection in file\n" +
"5 - edit an order and rewrite collection in file\n" +
"6 - exit program\n");
string choice = Console.ReadLine();
while (!Validation1.check_if_int(choice) || Convert.ToInt32(choice) < 1 || Convert.ToInt32(choice) > 6)
{
Console.WriteLine("REENTER YOIR CHOICE:");
choice = Console.ReadLine();
}
res = Convert.ToInt32(choice);
return(res);
}