exercism/csharp/leap/leap.cs

class Year {
  public static bool IsLeap(int i) {
        if(i % 4 == 0) {
            if(i % 100 == 0) {
                if (i % 400 != 0) {
                    return false;
                }
            }
            return true;
        }
        return false;
  }
}