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

This is an old question but I was looking up IP Comparer's and it came up. I wanted something that worked for IPv6 as well though so once I got it I thought I'd add it here for the next person who does a search for it. Much like SLaks's answer, I agree that an IComparer is probably best.

public class IPComparer : IComparer
{
    public int Compare(IPAddress x, IPAddress y)
    {
        if (ReferenceEquals(x, null))
            throw new ArgumentNullException("x");

        if (ReferenceEquals(y, null))
            throw new ArgumentNullException("y");

        return BitConverter.ToUInt32(x.GetAddressBytes().Reverse().ToArray(),0)
            .CompareTo(BitConverter.ToUInt32(y.GetAddressBytes().Reverse().ToArray(),0));
    }
}

Nothing fancy but it should work.