Bug Report for two-integer-sum

[ankitkay95]

Bug Report for https://neetcode.io/problems/two-integer-sum

Please describe the bug below and include any steps to reproduce the bug or screenshots if possible.

this should fail for
[1,1,1,1,1,4,1,1,1,1,1,7,1,1,1,1,1]
and target 11 when code is like below for c#

public class Solution {
	public int[] TwoSum(int[] nums, int target) {
        var eleAndIdx = new Dictionary<int, int>();
        for (int i=0; i<nums.Length; i++)
        {
            var complement = target - nums[i];
            if (eleAndIdx.ContainsKey(complement))
            {
                return new int[]{eleAndIdx[complement], i};
            }
            else
            {
                eleAndIdx.Add(nums[i], i);
            }
        }
        return new int[]{0};
    }
}

as .Add() on a dictionary in c# with the same key should throw an exception