获取系统版本

using System;
using System.Collections;
using System.Globalization;
using System.IO;
using System.Net;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Web;
using System.Runtime.Serialization.Formatters.Binary;
using System.Security.Cryptography.X509Certificates;

public static string getOSVersion(out int version)
{
OperatingSystem os = Environment.OSVersion;
version = os.Version.Major;
string label1Text = "";
switch (os.Platform)
{
case PlatformID.Win32Windows:
switch (os.Version.Minor)
{
case 0:
label1Text = "Windows 95 ";
break;
case 10:
if (os.Version.Revision.ToString() == "2222A ")
label1Text = "Windows 98 第二版 ";
else
label1Text = "Windows 98 ";
break;
case 90:
label1Text = "Windows Me ";
break;
}
break;
case PlatformID.Win32NT:
switch (os.Version.Major)
{
case 3:
label1Text = "Windows NT 3.51 ";
break;
case 4:
label1Text = "Windows NT 4.0 ";
break;
case 5:
switch (os.Version.Minor)
{
case 0:
label1Text = "Windows 200 ";
break;
case 1:
label1Text = "Windows XP ";
break;
case 2:
label1Text = "Windows 2003 ";
break;
}
break;
case 6:
switch (os.Version.Minor)
{
case 0:
label1Text = "Windows Vista ";
break;
case 1:
label1Text = "Windows 7 ";
break;
}
break;
}
break;
}
return label1Text;
}