Detect Windows version in net

Question

How can I detect the Windows OS versions in  net   What code can I use

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These all seem like very complicated answers for a very simple function   public bool IsWindows7         get                 return  Environment OSVersion Version Major    6  amp              Environment OSVersion Version Minor    1

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I used this when I had to determine various Microsoft Operating System versions   string getOSInfo          Get Operating system information     OperatingSystem os   Environment OSVersion       Get version information about the os     Version vs   os Version        Variable to hold our return value    string operatingSystem           if  os Platform    PlatformID Win32Windows                This is a pre-NT version of Windows        switch  vs Minor                      case 0                 operatingSystem    95                  break             case 10                 if  vs Revision ToString       2222A                      operatingSystem    98SE                  else                    operatingSystem    98                  break             case 90                 operatingSystem    Me                  break             default                 break                   else if  os Platform    PlatformID Win32NT              switch  vs Major                      case 3                 operatingSystem    NT 3 51                  break             case 4                 operatingSystem    NT 4 0                  break             case 5                 if  vs Minor    0                     operatingSystem    2000                  else                    operatingSystem    XP                  break             case 6                 if  vs Minor    0                     operatingSystem    Vista                  else if  vs Minor    1                     operatingSystem    7                  else if  vs Minor    2                     operatingSystem    8                  else                    operatingSystem    8 1                  break             case 10                 operatingSystem    10                  break             default                 break                     Make sure we actually got something in our OS check      We don t want to just return   Service Pack 2  or   32-bit       That information is useless without the OS version     if  operatingSystem                      Got something   Let s prepend  Windows  and get more info         operatingSystem    Windows     operatingSystem           See if there s a service pack installed         if  os ServicePack                              Append it to the OS name   i e   Windows XP Service Pack 3             operatingSystem          os ServicePack                    Append the OS architecture   i e   Windows XP Service Pack 3 32-bit           operatingSystem          getOSArchitecture   ToString      -bit             Return the information we ve gathered     return operatingSystem      Source  here

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You can use this helper class   using System  using System Runtime InteropServices        lt summary gt      Provides detailed information about the host operating system       lt  summary gt  public static class OSInfo        region BITS          lt summary gt          Determines if the current application is 32 or 64-bit           lt  summary gt      public static int Bits               get                       return IntPtr Size   8                       endregion BITS       region EDITION     private static string s Edition           lt summary gt          Gets the edition of the operating system running on this computer           lt  summary gt      public static string Edition               get                       if  s Edition    null                  return s Edition           RETURN                      string edition   String Empty               OperatingSystem osVersion   Environment OSVersion              OSVERSIONINFOEX osVersionInfo   new OSVERSIONINFOEX                osVersionInfo dwOSVersionInfoSize   Marshal SizeOf  typeof  OSVERSIONINFOEX                   if  GetVersionEx  ref osVersionInfo                                  int majorVersion   osVersion Version Major                  int minorVersion   osVersion Version Minor                  byte productType   osVersionInfo wProductType                  short suiteMask   osVersionInfo wSuiteMask                    region VERSION 4                 if  majorVersion    4                                        if  productType    VER NT WORKSTATION                                                   Windows NT 4 0 Workstation                         edition    Workstation                                             else if  productType    VER NT SERVER                                                if   suiteMask  amp  VER SUITE ENTERPRISE     0                                                           Windows NT 4 0 Server Enterprise                             edition    Enterprise Server                                                     else                                                          Windows NT 4 0 Server                             edition    Standard Server                                                                                      endregion VERSION 4                   region VERSION 5                 else if  majorVersion    5                                        if  productType    VER NT WORKSTATION                                                if   suiteMask  amp  VER SUITE PERSONAL     0                                                           Windows XP Home Edition                             edition    Home                                                     else                                                          Windows XP   Windows 2000 Professional                             edition    Professional                                                                       else if  productType    VER NT SERVER                                                if  minorVersion    0                                                        if   suiteMask  amp  VER SUITE DATACENTER     0                                                                   Windows 2000 Datacenter Server                                 edition    Datacenter Server                                                             else if   suiteMask  amp  VER SUITE ENTERPRISE     0                                                                   Windows 2000 Advanced Server                                 edition    Advanced Server                                                             else                                                                  Windows 2000 Server                                 edition    Server                                                                                   else                                                       if   suiteMask  amp  VER SUITE DATACENTER     0                                                                   Windows Server 2003 Datacenter Edition                                 edition    Datacenter                                                             else if   suiteMask  amp  VER SUITE ENTERPRISE     0                                                                   Windows Server 2003 Enterprise Edition                                 edition    Enterprise                                                             else if   suiteMask  amp  VER SUITE BLADE     0                                                                   Windows Server 2003 Web Edition                                 edition    Web Edition                                                             else                                                                  Windows Server 2003 Standard Edition                                 edition    Standard                                                                                                                    endregion VERSION 5                   region VERSION 6                 else if  majorVersion    6                                        int ed                      if  GetProductInfo  majorVersion  minorVersion                          osVersionInfo wServicePackMajor  osVersionInfo wServicePackMinor                          out ed                                                  switch  ed                                                        case PRODUCT BUSINESS                                  edition    Business                                   break                              case PRODUCT BUSINESS N                                  edition    Business N                                   break                              case PRODUCT CLUSTER SERVER                                  edition    HPC Edition                                   break                              case PRODUCT DATACENTER SERVER                                  edition    Datacenter Server                                   break                              case PRODUCT DATACENTER SERVER CORE                                  edition    Datacenter Server  core installation                                    break                              case PRODUCT ENTERPRISE                                  edition    Enterprise                                   break                              case PRODUCT ENTERPRISE N                                  edition    Enterprise N                                   break                              case PRODUCT ENTERPRISE SERVER                                  edition    Enterprise Server                                   break                              case PRODUCT ENTERPRISE SERVER CORE                                  edition    Enterprise Server  core installation                                    break                              case PRODUCT ENTERPRISE SERVER CORE V                                  edition    Enterprise Server without Hyper-V  core installation                                    break                              case PRODUCT ENTERPRISE SERVER IA64                                  edition    Enterprise Server for Itanium-based Systems                                   break                              case PRODUCT ENTERPRISE SERVER V                                  edition    Enterprise Server without Hyper-V                                   break                              case PRODUCT HOME BASIC                                  edition    Home Basic                                   break                              case PRODUCT HOME BASIC N                                  edition    Home Basic N                                   break                              case PRODUCT HOME PREMIUM                                  edition    Home Premium                                   break                              case PRODUCT HOME PREMIUM N                                  edition    Home Premium N                                   break                              case PRODUCT HYPERV                                  edition    Microsoft Hyper-V Server                                   break                              case PRODUCT MEDIUMBUSINESS SERVER MANAGEMENT                                  edition    Windows Essential Business Management Server                                   break                              case PRODUCT MEDIUMBUSINESS SERVER MESSAGING                                  edition    Windows Essential Business Messaging Server                                   break                              case PRODUCT MEDIUMBUSINESS SERVER SECURITY                                  edition    Windows Essential Business Security Server                                   break                              case PRODUCT SERVER FOR SMALLBUSINESS                                  edition    Windows Essential Server Solutions                                   break                              case PRODUCT SERVER FOR SMALLBUSINESS V                                  edition    Windows Essential Server Solutions without Hyper-V                                   break                              case PRODUCT SMALLBUSINESS SERVER                                  edition    Windows Small Business Server                                   break                              case PRODUCT STANDARD SERVER                                  edition    Standard Server                                   break                              case PRODUCT STANDARD SERVER CORE                                  edition    Standard Server  core installation                                    break                              case PRODUCT STANDARD SERVER CORE V                                  edition    Standard Server without Hyper-V  core installation                                    break                              case PRODUCT STANDARD SERVER V                                  edition    Standard Server without Hyper-V                                   break                              case PRODUCT STARTER                                  edition    Starter                                   break                              case PRODUCT STORAGE ENTERPRISE SERVER                                  edition    Enterprise Storage Server                                   break                              case PRODUCT STORAGE EXPRESS SERVER                                  edition    Express Storage Server                                   break                              case PRODUCT STORAGE STANDARD SERVER                                  edition    Standard Storage Server                                   break                              case PRODUCT STORAGE WORKGROUP SERVER                                  edition    Workgroup Storage Server                                   break                              case PRODUCT UNDEFINED                                  edition    Unknown product                                   break                              case PRODUCT ULTIMATE                                  edition    Ultimate                                   break                              case PRODUCT ULTIMATE N                                  edition    Ultimate N                                   break                              case PRODUCT WEB SERVER                                  edition    Web Server                                   break                              case PRODUCT WEB SERVER CORE                                  edition    Web Server  core installation                                    break                                                                                     endregion VERSION 6                            s Edition   edition              return edition                       endregion EDITION       region NAME     private static string s Name           lt summary gt          Gets the name of the operating system running on this computer           lt  summary gt      public static string Name               get                       if  s Name    null                  return s Name           RETURN                      string name    unknown                OperatingSystem osVersion   Environment OSVersion              OSVERSIONINFOEX osVersionInfo   new OSVERSIONINFOEX                osVersionInfo dwOSVersionInfoSize   Marshal SizeOf  typeof  OSVERSIONINFOEX                   if  GetVersionEx  ref osVersionInfo                                  int majorVersion   osVersion Version Major                  int minorVersion   osVersion Version Minor                   switch  osVersion Platform                                        case PlatformID Win32Windows                                                        if  majorVersion    4                                                                string csdVersion   osVersionInfo szCSDVersion                                  switch  minorVersion                                                                        case 0                                          if  csdVersion     B     csdVersion     C                                               name    Windows 95 OSR2                                           else                                             name    Windows 95                                           break                                      case 10                                          if  csdVersion     A                                               name    Windows 98 Second Edition                                           else                                             name    Windows 98                                           break                                      case 90                                          name    Windows Me                                           break                                                                                              break                                                 case PlatformID Win32NT                                                        byte productType   osVersionInfo wProductType                               switch  majorVersion                                                                case 3                                      name    Windows NT 3 51                                       break                                  case 4                                      switch  productType                                                                                case 1                                              name    Windows NT 4 0                                               break                                          case 3                                              name    Windows NT 4 0 Server                                               break                                                                            break                                  case 5                                      switch  minorVersion                                                                                case 0                                              name    Windows 2000                                               break                                          case 1                                              name    Windows XP                                               break                                          case 2                                              name    Windows Server 2003                                               break                                                                            break                                  case 6                                      switch  productType                                                                                case 1                                              name    Windows Vista                                               break                                          case 3                                              name    Windows Server 2008                                               break                                                                            break                                                            break                                                                         s Name   name              return name                       endregion NAME       region PINVOKE      region GET      region PRODUCT INFO      DllImport   Kernel32 dll         internal static extern bool GetProductInfo          int osMajorVersion          int osMinorVersion          int spMajorVersion          int spMinorVersion          out int edition         endregion PRODUCT INFO       region VERSION      DllImport   kernel32 dll         private static extern bool GetVersionEx  ref OSVERSIONINFOEX osVersionInfo         endregion VERSION      endregion GET       region OSVERSIONINFOEX      StructLayout  LayoutKind Sequential        private struct OSVERSIONINFOEX               public int dwOSVersionInfoSize          public int dwMajorVersion          public int dwMinorVersion          public int dwBuildNumber          public int dwPlatformId           MarshalAs  UnmanagedType ByValTStr  SizeConst   128            public string szCSDVersion          public short wServicePackMajor          public short wServicePackMinor          public short wSuiteMask          public byte wProductType          public byte wReserved             endregion OSVERSIONINFOEX       region PRODUCT     private const int PRODUCT UNDEFINED   0x00000000      private const int PRODUCT ULTIMATE   0x00000001      private const int PRODUCT HOME BASIC   0x00000002      private const int PRODUCT HOME PREMIUM   0x00000003      private const int PRODUCT ENTERPRISE   0x00000004      private const int PRODUCT HOME BASIC N   0x00000005      private const int PRODUCT BUSINESS   0x00000006      private const int PRODUCT STANDARD SERVER   0x00000007      private const int PRODUCT DATACENTER SERVER   0x00000008      private const int PRODUCT SMALLBUSINESS SERVER   0x00000009      private const int PRODUCT ENTERPRISE SERVER   0x0000000A      private const int PRODUCT STARTER   0x0000000B      private const int PRODUCT DATACENTER SERVER CORE   0x0000000C      private const int PRODUCT STANDARD SERVER CORE   0x0000000D      private const int PRODUCT ENTERPRISE SERVER CORE   0x0000000E      private const int PRODUCT ENTERPRISE SERVER IA64   0x0000000F      private const int PRODUCT BUSINESS N   0x00000010      private const int PRODUCT WEB SERVER   0x00000011      private const int PRODUCT CLUSTER SERVER   0x00000012      private const int PRODUCT HOME SERVER   0x00000013      private const int PRODUCT STORAGE EXPRESS SERVER   0x00000014      private const int PRODUCT STORAGE STANDARD SERVER   0x00000015      private const int PRODUCT STORAGE WORKGROUP SERVER   0x00000016      private const int PRODUCT STORAGE ENTERPRISE SERVER   0x00000017      private const int PRODUCT SERVER FOR SMALLBUSINESS   0x00000018      private const int PRODUCT SMALLBUSINESS SERVER PREMIUM   0x00000019      private const int PRODUCT HOME PREMIUM N   0x0000001A      private const int PRODUCT ENTERPRISE N   0x0000001B      private const int PRODUCT ULTIMATE N   0x0000001C      private const int PRODUCT WEB SERVER CORE   0x0000001D      private const int PRODUCT MEDIUMBUSINESS SERVER MANAGEMENT   0x0000001E      private const int PRODUCT MEDIUMBUSINESS SERVER SECURITY   0x0000001F      private const int PRODUCT MEDIUMBUSINESS SERVER MESSAGING   0x00000020      private const int PRODUCT SERVER FOR SMALLBUSINESS V   0x00000023      private const int PRODUCT STANDARD SERVER V   0x00000024      private const int PRODUCT ENTERPRISE SERVER V   0x00000026      private const int PRODUCT STANDARD SERVER CORE V   0x00000028      private const int PRODUCT ENTERPRISE SERVER CORE V   0x00000029      private const int PRODUCT HYPERV   0x0000002A       endregion PRODUCT       region VERSIONS     private const int VER NT WORKSTATION   1      private const int VER NT DOMAIN CONTROLLER   2      private const int VER NT SERVER   3      private const int VER SUITE SMALLBUSINESS   1      private const int VER SUITE ENTERPRISE   2      private const int VER SUITE TERMINAL   16      private const int VER SUITE DATACENTER   128      private const int VER SUITE SINGLEUSERTS   256      private const int VER SUITE PERSONAL   512      private const int VER SUITE BLADE   1024       endregion VERSIONS      endregion PINVOKE       region SERVICE PACK          lt summary gt          Gets the service pack information of the operating system running on this computer           lt  summary gt      public static string ServicePack               get                       string servicePack   String Empty              OSVERSIONINFOEX osVersionInfo   new OSVERSIONINFOEX                 osVersionInfo dwOSVersionInfoSize   Marshal SizeOf  typeof  OSVERSIONINFOEX                   if  GetVersionEx  ref osVersionInfo                                  servicePack   osVersionInfo szCSDVersion                             return servicePack                       endregion SERVICE PACK       region VERSION      region BUILD          lt summary gt          Gets the build version number of the operating system running on this computer           lt  summary gt      public static int BuildVersion               get                       return Environment OSVersion Version Build                       endregion BUILD       region FULL      region STRING          lt summary gt          Gets the full version string of the operating system running on this computer           lt  summary gt      public static string VersionString               get                       return Environment OSVersion Version ToString                         endregion STRING       region VERSION          lt summary gt          Gets the full version of the operating system running on this computer           lt  summary gt      public static Version Version               get                       return Environment OSVersion Version                       endregion VERSION      endregion FULL       region MAJOR          lt summary gt          Gets the major version number of the operating system running on this computer           lt  summary gt      public static int MajorVersion               get                       return Environment OSVersion Version Major                       endregion MAJOR       region MINOR          lt summary gt          Gets the minor version number of the operating system running on this computer           lt  summary gt      public static int MinorVersion               get                       return Environment OSVersion Version Minor                       endregion MINOR       region REVISION          lt summary gt          Gets the revision version number of the operating system running on this computer           lt  summary gt      public static int RevisionVersion               get                       return Environment OSVersion Version Revision                       endregion REVISION      endregion VERSION     Sample code is here       Console WriteLine   Operation System Information         Console WriteLine   ----------------------------         Console WriteLine   Name    0    OSInfo Name        Console WriteLine   Edition    0    OSInfo Edition        Console WriteLine   Service Pack    0    OSInfo ServicePack        Console WriteLine   Version    0    OSInfo VersionString        Console WriteLine   Bits    0    OSInfo Bits      I was found at this address   http   www csharp411 com wp-content uploads 2009 01 OSInfo cs

User · Answer

One way   public string GetOSVersion       int  MajorVersion   Environment OSVersion Version Major     switch   MajorVersion        case 5        return  Windows XP       case 6        switch  Environment OSVersion Version Minor            case 0            return  Windows Vista           case 1            return  Windows 7           default            return  Windows Vista  amp  above                 break      default        return  Unknown           Then simply do wrap a select case around the function

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Like R  Bemrose suggested  if you are doing Windows 7 specific features  you should look at the Windows   API Code Pack for Microsoft    NET Framework   It contains a CoreHelpers class that let you determine the OS you are currently on  XP and above only  its a requirement for  NET nowaday   It also provide multiple helper methods  For example  suppose that you want to use the jump list of Windows 7  there is a class TaskbarManager that provide a property called IsPlatformSupported and it will return true if you are on Windows 7 and above

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Via Environment OSVersion which  Gets an System OperatingSystem object that contains the current platform identifier and version number

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The above answers would give me Major version 6 on Windows 10   The solution that I have found to work without adding extra VB libraries was following   var versionString    string Microsoft Win32 Registry LocalMachine OpenSubKey  Software  Microsoft  Windows NT  CurrentVersion    GetValue  productName      I wouldn t consider this the best way to get the version  but the upside this is oneliner no extra libraries  and in my case checking if it contains  10  was good enough

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Add reference to Microsoft VisualBasic  Include namespace using Microsoft VisualBasic Devices  Use new ComputerInfo   OSFullName   The return value is  Microsoft Windows 10 Enterprise

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This is a relatively old question but I ve recently had to solve this problem and didn t see my solution posted anywhere   The easiest  and simplest way in my opinion  is to just use a pinvoke call to RtlGetVersion   DllImport  ntdll dll   SetLastError   true   internal static extern uint RtlGetVersion out Structures OsVersionInfo versionInformation      return type should be the NtStatus enum   StructLayout LayoutKind Sequential   internal struct OsVersionInfo       private readonly uint OsVersionInfoSize       internal readonly uint MajorVersion      internal readonly uint MinorVersion       private readonly uint BuildNumber       private readonly uint PlatformId        MarshalAs UnmanagedType ByValTStr  SizeConst   128       private readonly string CSDVersion      Where Major and Minor version numbers in this struct correspond to the values in the table of the accepted answer   This returns the correct Windows version number unlike the deprecated GetVersion  amp  GetVersionEx functions from kernel32

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Don t over complicate the problem    string osVer   System Environment OSVersion Version ToString     if  osVer StartsWith  5       windows 2000  xp win2k3       MessageBox Show  xp       else    windows vista and windows 7 start with 6 in the version         MessageBox Show  Win7

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I use the ManagementObjectSearcher of namespace System Management  Example   string r       using  ManagementObjectSearcher searcher   new ManagementObjectSearcher  SELECT   FROM Win32 OperatingSystem          ManagementObjectCollection information   searcher Get        if  information    null                foreach  ManagementObject obj in information                        r   obj  Caption   ToString       -     obj  OSArchitecture   ToString                        r   r Replace  NT 5 1 2600    XP        r   r Replace  NT 5 2 3790    Server 2003        MessageBox Show r          Do not forget to add the reference to the Assembly System Management dll   and put the using  using System Management    Result     Documentation

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Detect OS Version       public static string OS Name                 return  string  from x in new ManagementObjectSearcher               SELECT Caption FROM Win32 OperatingSystem   Get   Cast lt ManagementObject gt                 select x GetPropertyValue  Caption    FirstOrDefault

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First solution  To make sure you get the right version with Environment OSVersion you should add an app manifest using Visual Studio and uncomment following supportedOS tags      lt compatibility xmlns  urn schemas-microsoft-com compatibility v1  gt       lt application gt         lt  -- A list of the Windows versions that this application has been tested on            and is designed to work with  Uncomment the appropriate elements            and Windows will automatically select the most compatible environment  -- gt          lt  -- Windows Vista -- gt         lt supportedOS Id   e2011457-1546-43c5-a5fe-008deee3d3f0     gt          lt  -- Windows 7 -- gt         lt supportedOS Id   35138b9a-5d96-4fbd-8e2d-a2440225f93a     gt          lt  -- Windows 8 -- gt         lt supportedOS Id   4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38     gt          lt  -- Windows 8 1 -- gt         lt supportedOS Id   1f676c76-80e1-4239-95bb-83d0f6d0da78     gt          lt  -- Windows 10 -- gt         lt supportedOS Id   8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a     gt        lt  application gt     lt  compatibility gt    Then in your code you can use Environment OSVersion like this   var version   System Environment OSVersion  Console WriteLine version     Example  For instance in my machine  Windows 10 0 Build 18362 476  result would be like this which is incorrect   Microsoft Windows NT 6 2 9200 0   By adding app manifest and uncomment those tags I will get the right version number   Microsoft Windows NT 10 0 18362 0     Alternative solution  If you don t like adding app manifest to your project  you can use OSDescription which is available since  NET Framework 4 7 1 and  NET Core 1 0   string description   RuntimeInformation OSDescription    Note  Don t forget to add following using statement at top of your file   using System Runtime InteropServices    You can read more about it and supported platforms here

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How about using a Registry to get the name    HKEY LOCAL MACHINE SOFTWARE Microsoft Windows NT CurrentVersion  has a value ProductName since Windows XP    DllImport  kernel32 dll    static extern IntPtr GetCurrentProcess      DllImport  kernel32 dll    static extern IntPtr GetModuleHandle string moduleName     DllImport  kernel32    static extern IntPtr GetProcAddress IntPtr hModule  string procName     DllImport  kernel32 dll    static extern bool IsWow64Process IntPtr hProcess  out bool wow64Process    public static bool Is64BitOperatingSystem            Check if this process is natively an x64 process  If it is  it will only run on x64 environments  thus  the environment must be x64      if  IntPtr Size    8          return true         Check if this process is an x86 process running on an x64 environment      IntPtr moduleHandle   GetModuleHandle  kernel32        if  moduleHandle    IntPtr Zero                IntPtr processAddress   GetProcAddress moduleHandle   IsWow64Process            if  processAddress    IntPtr Zero                        bool result              if  IsWow64Process GetCurrentProcess    out result   amp  amp  result                  return true                         The environment must be an x86 environment      return false     private static string HKLM GetString string key  string value        try               RegistryKey registryKey   Registry LocalMachine OpenSubKey key           return registryKey  GetValue value  ToString      String Empty            catch               return String Empty           public static string GetWindowsVersion         string osArchitecture      try               osArchitecture   Is64BitOperatingSystem      64-bit     32-bit             catch  Exception                osArchitecture    32 64-bit  Undetermined              string productName   HKLM GetString   SOFTWARE Microsoft Windows NT CurrentVersion    ProductName        string csdVersion   HKLM GetString   SOFTWARE Microsoft Windows NT CurrentVersion    CSDVersion        string currentBuild   HKLM GetString   SOFTWARE Microsoft Windows NT CurrentVersion    CurrentBuild        if   string IsNullOrEmpty productName                 return                productName    string IsNullOrEmpty csdVersion          csdVersion   String Empty    osArchitecture   OS Build  currentBuild               return String Empty      If you are using  NET Framework 4 0 or above  You can remove the Is64BitOperatingSystem   method and use Environment Is64BitOperatingSystem

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System Environment OSVersion has the information you need for distinguishing most Windows OS major releases  but not all   It consists of three components which map to the following Windows versions    ------------------------------------------------------------------------------                           PlatformID        Major version       Minor version      ------------------------------------------------------------------------------    Windows 95            Win32Windows             4                    0            Windows 98            Win32Windows             4                   10            Windows Me            Win32Windows             4                   90            Windows NT 4 0        Win32NT                  4                    0            Windows 2000          Win32NT                  5                    0            Windows XP            Win32NT                  5                    1            Windows 2003          Win32NT                  5                    2            Windows Vista         Win32NT                  6                    0            Windows 2008          Win32NT                  6                    0            Windows 7             Win32NT                  6                    1            Windows 2008 R2       Win32NT                  6                    1            Windows 8             Win32NT                  6                    2            Windows 8 1           Win32NT                  6                    3           ------------------------------------------------------------------------------    Windows 10            Win32NT                 10                    0           ------------------------------------------------------------------------------    For a library that allows you to get a more complete view of the exact release of Windows that the current execution environment is running in  check out this library   Important note  if your executable assembly manifest doesn t explicitly state that your exe assembly is compatible with Windows 8 1 and Windows 10 0  System Environment OSVersion will return Windows 8 version  which is 6 2  instead of 6 3 and 10 0  Source  here

[c#] Detect Windows version in .net

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