Windows Version auslesen

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        public string GetVersionString()
        {
            OperatingSystem osInfo = System.Environment.OSVersion;
            string strVers = string.Empty;

            if (osInfo.Platform == PlatformID.Win32Windows)
            {
                // Windows 98 / 98SE oder Windows Me. Windows 95 unterstützt .NET nicht 
                if (osInfo.Version.Minor == 10) strVers = "Windows 98";
                if (osInfo.Version.Minor == 90) strVers = "Windows Me";
            }

            if (osInfo.Platform == PlatformID.Win32NT)
            {
                // Windows NT 4.0, 2000, XP oder Server 2003. Windows NT 3.51 unterstützt .NET nicht 
                if (osInfo.Version.Major == 4) strVers = "Windows NT 4.0";

                if (osInfo.Version.Major == 5)
                {
                    switch (osInfo.Version.Minor)
                    {
                        case 0: strVers = "Windows 2000"; break;
                        case 1: strVers = "Windows XP"; break;
                        case 2: strVers = "Windows Server 2003"; break;
                    }
                }
                if (osInfo.Version.Major == 6)
                {
                    if (osInfo.Version.Minor == 0)
                    {
                        strVers = "Vista/Win2008";
                    }
                }
            }

            strVers += " " + osInfo.ServicePack + ", Revision " + osInfo.Version.Revision.ToString() + ", " + osInfo.VersionString;

            if (strVers == "")
            {
                strVers = "Unbekannte Windows-Version";
            }

            return strVers;
        }