Level points C#

Question

Please tell where i am wrong

Answer 1

static void Main(string[] args)
{
int levels = Convert.ToInt32(Console.ReadLine());

Console.WriteLine(Points(levels));
}

static int Points(int levels)
{
//your code goes here
int total = (levels + 1) * levels / 2;
return total;

Answer 2

Read Question properly for this problem u need one loop upto base case suppose if u have 5 level then loop should start form 0 to 4 he u have to add points sum=sum+i;

Or u can do this with recursive type function suppose n is a number
return n+(n-1)