Answer 1

What is a "random chance line"?

Answer 2

Have a collection(array, list etc) and pull a random element from it like this.

int[] nums = { 1, 2, 3, 4, 5 };
Random r = new Random();
int randomElement = nums[r.Next(0, nums.Length)];

Answer 3

Attempts?

Answer 4

So for example you have an array and want to choose one element at random?