na-get-lib/NaGet.InteropServices/WindowsVersion.cs

   1 using System;
   2 using System.Runtime.InteropServices;
   3 using System.Runtime.InteropServices.ComTypes;
   4
   5 namespace NaGet.InteropServices
   6 {
   7         /// <summary>
   8         /// Windows Os Version
   9         /// </summary>
  10         public sealed class WindowsVersion
  11         {
  12                 [DllImport("ntdll.dll", SetLastError=true)]
  13                 private static extern int RtlGetVersion([In, Out] ref OSVERSIONINFOEX lpVersionInformation);
  14
  15                 [StructLayout(LayoutKind.Sequential)]
  16                 private struct OSVERSIONINFOEX
  17                 {
  18                         public uint dwOSVersionInfoSize;
  19                         public uint dwMajorVersion;
  20                         public uint dwMinorVersion;
  21                         public uint dwBuildNumber;
  22                         public uint dwPlatformId;
  23                         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=128)]
  24                         public string szCSDVersion;
  25                         public ushort wServicePackMajor;
  26                         public ushort wServicePackMinor;
  27                         public ushort wSuiteMask;
  28                         public char wProductType;
  29                         public char wReserved;
  30                 }
  31
  32                 public struct VersionInfo {
  33                         public uint MajorVersion;
  34                         public uint MinorVersion;
  35                         public uint BuildNumber;
  36                         public ushort ServicePackMajor;
  37                         public ushort ServicePackMinor;
  38                 }
  39
  40                 public static VersionInfo? GetVersionInfo() {
  41                         VersionInfo? retval = null;
  42
  43                         try {
  44                                 OSVERSIONINFOEX versionInformation = new OSVERSIONINFOEX();
  45                                 versionInformation.dwOSVersionInfoSize = (uint)Marshal.SizeOf(versionInformation);
  46
  47                                 int result = RtlGetVersion(ref versionInformation);
  48                                 if (result == 0) {
  49                                         VersionInfo info = new VersionInfo();
  50                                         info.MajorVersion = versionInformation.dwMajorVersion;
  51                                         info.MinorVersion = versionInformation.dwMinorVersion;
  52                                         info.BuildNumber = versionInformation.dwBuildNumber;
  53                                         info.ServicePackMajor = versionInformation.wServicePackMajor;
  54                                         info.ServicePackMinor = versionInformation.wServicePackMinor;
  55
  56                                         retval = info;
  57                                 }
  58                         } catch (Exception) {
  59                                 // Drop any exception
  60                         }
  61
  62                         return retval;
  63                 }
  64         }
  65 }