Linq/Lambda OrderBy Delegate for List of IP Addresses

Question

Given List ips = new List();

I need to sort the list of IP addresses in a logical order (i.e. \"192.168.0.2\" comes before \

Answer 1

I would create a comparer for System.Net.IPAddress like so

class IPAddressComparer : IComparer {
    public int Compare(IPAddress x, IPAddress y) {
        byte[] first = x.GetAddressBytes();
        byte[] second = y.GetAddressBytes();
        return first.Zip(second, (a, b) => a.CompareTo(b))
                    .FirstOrDefault(c => c != 0);
    }   
}

and then proceed as follows:

var list = new List() {
    "192.168.0.1",
    "192.168.0.10",
    "192.168.0.2",
    "192.168.0.200"
};
var sorted = list.OrderBy(s => IPAddress.Parse(s), new IPAddressComparer());