バグを見つけろ：.NET

1public class RangeValidator
2{
3    public bool IsWithinRange(int value, int maxDistance)
4    {
5        if (maxDistance < 0)
6            throw new ArgumentException("maxDistance must be non-negative");
7
8        int distance = Math.Abs(value);
9        return distance <= maxDistance;
10    }
11}