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C# adding unknown number of values into an array
while (numbers[i] != 10)
{
    i++;
    numbers[i] = int.Parse(Console.ReadLine());
    Console.WriteLine(numbers[i]);
}

var input = Console.ReadLine();
if (input == "") {
    break;
}

numbers[i] = int.Parse(input);
// etc

var numbers = new List<int>();
string s;
while(!string.IsNullOrEmpty(s = Console.ReadLine())) {
    numbers.Add(int.Parse(s));
}

List<int> numbers = new List<int>();

while (numbers[i] != 10)
{
    i++;

    string input = Console.ReadLine();
    if (string.IsNullOrEmpty(input)) { break; }

    numbers.Add(int.Parse(input));
    Console.WriteLine(numbers[i]);
}