检查服务器是Windows还是Linux

using System;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.NetworkInformation;
using System.Text;

class Program
{
    static void Main()
    {
        StreamReader sr = new StreamReader(@"C:\Users\****\Desktop\iplist.txt", Encoding.Default);
        String line;
        while ((line = sr.ReadLine()) != null)
        {
            if (!IsWindows(line.ToString()))
            {
                Console.WriteLine(line.ToString());

            }
        }

    }

    public static bool IsWindows(string strIP)
    {
        bool bResult = false;
        try
        {
            Ping p = new Ping();
            PingReply pr = p.Send(strIP, 500);
            if (pr != null && pr.Status == IPStatus.Success)
            {
                int iTTL = pr.Options.Ttl;
                bResult = (iTTL > 64);
            }
        }
        catch (Exception ex)
        {

        }
        return bResult;
    }

}