To input, you probably need to use Console.ReadLine:
string input = Console.ReadLine();
You can then convert the second input to a number using TryParse:
int count;
string countAsString = Console.ReadLine();
if (!int.TryParse(countAsString, out count))
{
Console.WriteLine("\"{0}\" is not a number!", countAsString);
}
else
{
... process your count and symbols here ...
}