using System.Collections.Generic; namespace API.Comparators { public class ChapterSortComparer : IComparer { public int Compare(double x, double y) { if (x == 0.0 && y == 0.0) return 0; // if x is 0, it comes second if (x == 0.0) return 1; // if y is 0, it comes second if (y == 0.0) return -1; return x.CompareTo(y); } } }