How to get name of mobile devices connected to wireless network in c#

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C#

I am trying to get names of devices connected to my wireless network with below code:

public string GetHostName(string ipAddress)
    {
        try
        {
            if (ipAddress != null)
            {
                IPHostEntry entry = Dns.GetHostEntry(ipAddress);
                if (entry != null)
                {
                    return entry.HostName;
                }
            }
        }
        catch (SocketException)
        {
            // MessageBox.Show(e.Message.ToString());
        }

        return null;
    }

But its not working for mobile devices it always return null in that case. However I checked in other utilities they are able to find the host name of these mobile devices. So how can I fix this in C#.Net?