判断系统版本

        int _majorVersion;
        int _minorVersion;
        int _revision;
        int _buildNumber;
        string _versionNumber;
        SystemOS _osID;

        public void GetOsVersion()
        {
            OperatingSystem os = Environment.OSVersion;

            Version vs = os.Version;
            this._majorVersion = vs.Major;
            this._minorVersion = vs.Minor;
            this._revision = vs.Revision;
            this._buildNumber = vs.Build;

            this._versionNumber = this._majorVersion.ToString() + ":" +
                this._minorVersion.ToString() + ":" + this._revision.ToString() + ":" + this._buildNumber.ToString();

            if (os.Platform == PlatformID.Win32NT && vs.Major == 5)
            {
                if (vs.Minor > 0) { this._osID = SystemOS.WinXP; }
                else { this._osID = SystemOS.Win2K; }
            }
            else if (os.Platform == PlatformID.Win32NT && vs.Major == 6)
            {
                if (vs.Minor > 0) { this._osID = SystemOS.Win7; }
                else { this._osID = SystemOS.WinVista; }
            }
            else if (os.Platform == PlatformID.Win32NT && vs.Major <= 4)
            {
                this._osID = SystemOS.WinNT;
            }
            else if (os.Platform == PlatformID.Win32Windows)
            {
                if (vs.Major >= 4 && vs.Minor > 0)
                {
                    if (vs.Minor < 90)
                    {
                        this._osID = SystemOS.Win98;
                    }
                    else
                    {
                        this._osID = SystemOS.WinME;
                    }
                }
                else
                {
                    this._osID = SystemOS.Win95;
                }
            }
            else if (os.Platform == PlatformID.Win32S)
            {
                this._osID = SystemOS.Win32s;
            }
        }

        //---------------------------------------------------------------------------------------------------
        /// <summary>
        ///Define different Operating Systems
        /// </summary>
        public enum SystemOS
        {
            WinErr = 0, //Error
            Win95 = 1,
            Win98 = 2,
            WinME = 3,
            WinNT = 4,
            Win2K = 5,
            WinXP = 6,
            Win32s = 7,
            WinVista = 8,
            Win7 = 9
        }