private static void DetermineVersionNumberAndServerVersion()
{
var osVersionInfo = new NativeMethods.OSVERSIONINFOEX {
OSVersionInfoSize = Marshal.SizeOf(typeof(NativeMethods.OSVERSIONINFOEX))
};
if (NativeMethods.RtlGetVersion(ref osVersionInfo) != 0)
{
// TODO: Error handling
}
int ubr = 0;
using (RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion", false))
{
if (key != null)
{
object o = key.GetValue("UBR");
if (o is int i)
{
ubr = i;
}
}
}
_windowsVersionNumber = $"{osVersionInfo.MajorVersion}.{osVersionInfo.MinorVersion}.{osVersionInfo.BuildNumber}.{ubr}";
_isWindowsServerVersion = (osVersionInfo.ProductType & 2) != 0;
}
private static void UpdateData()
{
NativeMethods.OSVERSIONINFOEX info = new NativeMethods.OSVERSIONINFOEX();
info.dwOSVersionInfoSize = Marshal.SizeOf(info);
NativeMethods.SYSTEM_INFO sysInfo = new NativeMethods.SYSTEM_INFO();
NativeMethods.GetSystemInfo(out sysInfo);
if (!NativeMethods.GetVersionExW(ref info))
{
Marshal.ThrowExceptionForHR(Marshal.GetLastWin32Error());
}
Debug.Assert(info.dwMajorVersion == Environment.OSVersion.Version.Major);
Debug.Assert(info.dwMinorVersion == Environment.OSVersion.Version.Minor);
Debug.Assert(info.dwBuildNumber == Environment.OSVersion.Version.Build);
s_processorArchitecture = (ProcessorArchitecture)sysInfo.processorArchitecture;
s_servicePackVersion = new Version(info.wServicePackMajor, info.wServicePackMinor);
s_isServer = info.wProductType == NativeMethods.VER_NT_DOMAIN_CONTROLLER || info.wProductType == NativeMethods.VER_NT_SERVER;
if (info.dwMajorVersion > 6)
{
s_osVersionName = OSVersionName.Later;
}
else if (info.dwMajorVersion == 6)
{
if (info.dwMinorVersion == 0) // Windows Vista or Windows Server 2008
{
if (info.wProductType == NativeMethods.VER_NT_WORKSTATION) // Vista
{
s_osVersionName = OSVersionName.WindowsVista;
}
else
{
s_osVersionName = OSVersionName.WindowsServer2008;
}
}
else if (info.dwMinorVersion == 1) // Windows 7 or Windows Server 2008 R2
{
if (info.wProductType == NativeMethods.VER_NT_WORKSTATION)
{
s_osVersionName = Vss.OSVersionName.Windows7;
}
else
{
s_osVersionName = Vss.OSVersionName.WindowsServer2008R2;
}
}
else
{
s_osVersionName = Vss.OSVersionName.Later;
}
}
else if (info.dwMajorVersion == 5)
{
if (info.dwMinorVersion == 0)
{
s_osVersionName = OSVersionName.Windows2000;
}
if (info.dwMinorVersion == 1)
{
s_osVersionName = OSVersionName.WindowsXP;
}
else if (info.dwMinorVersion == 2)
{
if (info.wProductType == NativeMethods.VER_NT_WORKSTATION && s_processorArchitecture == ProcessorArchitecture.X64)
{
s_osVersionName = OSVersionName.WindowsXP;
}
else if (info.wProductType != NativeMethods.VER_NT_WORKSTATION)
{
s_osVersionName = OSVersionName.WindowsServer2003;
}
else
{
s_osVersionName = OSVersionName.Later;
}
}
else
{
s_osVersionName = OSVersionName.Later;
}
}
}
private static void UpdateData()
{
NativeMethods.OSVERSIONINFOEX info = new NativeMethods.OSVERSIONINFOEX();
info.dwOSVersionInfoSize = Marshal.SizeOf(info);
NativeMethods.SYSTEM_INFO sysInfo = new NativeMethods.SYSTEM_INFO();
NativeMethods.GetSystemInfo(out sysInfo);
if (!NativeMethods.GetVersionExW(ref info))
{
Marshal.ThrowExceptionForHR(Marshal.GetLastWin32Error());
}
Debug.Assert(info.dwMajorVersion == Environment.OSVersion.Version.Major);
Debug.Assert(info.dwMinorVersion == Environment.OSVersion.Version.Minor);
Debug.Assert(info.dwBuildNumber == Environment.OSVersion.Version.Build);
s_processorArchitecture = (ProcessorArchitecture)sysInfo.processorArchitecture;
s_servicePackVersion = new Version(info.wServicePackMajor, info.wServicePackMinor);
s_isServer = info.wProductType == NativeMethods.VER_NT_DOMAIN_CONTROLLER || info.wProductType == NativeMethods.VER_NT_SERVER;
if (info.dwMajorVersion > 6)
{
s_osVersionName = OSVersionName.Later;
}
else if (info.dwMajorVersion == 6)
{
if (info.dwMinorVersion == 0) // Windows Vista or Windows Server 2008
{
if (info.wProductType == NativeMethods.VER_NT_WORKSTATION) // Vista
{
s_osVersionName = OSVersionName.WindowsVista;
}
else
{
s_osVersionName = OSVersionName.WindowsServer2008;
}
}
else if (info.dwMinorVersion == 1) // Windows 7 or Windows Server 2008 R2
{
if (info.wProductType == NativeMethods.VER_NT_WORKSTATION)
{
s_osVersionName = Vss.OSVersionName.Windows7;
}
else
{
s_osVersionName = Vss.OSVersionName.WindowsServer2008R2;
}
}
else
{
s_osVersionName = Vss.OSVersionName.Later;
}
}
else if (info.dwMajorVersion == 5)
{
if (info.dwMinorVersion == 0)
{
s_osVersionName = OSVersionName.Windows2000;
}
if (info.dwMinorVersion == 1)
{
s_osVersionName = OSVersionName.WindowsXP;
}
else if (info.dwMinorVersion == 2)
{
if (info.wProductType == NativeMethods.VER_NT_WORKSTATION && s_processorArchitecture == ProcessorArchitecture.X64)
{
s_osVersionName = OSVersionName.WindowsXP;
}
else if (info.wProductType != NativeMethods.VER_NT_WORKSTATION)
{
s_osVersionName = OSVersionName.WindowsServer2003;
}
else
{
s_osVersionName = OSVersionName.Later;
}
}
else
{
s_osVersionName = OSVersionName.Later;
}
}
}
