how to locate numbers in a list if u input the numbers??

Question

the code i need is to print out the numbers when i input from where....to where!! ....noob here

public static void Main(string[] args)
{
List<int> list = new List<int>();
while (true)
{
int input = Convert.ToInt32(Console.ReadLine());
if (input == -1)
{
break;
}
list.Add(input);
}
Console.WriteLine("From where");
int number = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("To where");
int number2 = Convert.ToInt32(Console.ReadLine());
for (int i = 0; i < list.Count; i++)
Console.WriteLine(i);