private static bool GetIsWindows8OrAbove()
{
bool isWindows8OrAbove;
unsafe
{
ulong conditionMask = Win32Native.VerSetConditionMask(0, Win32Native.VER_MAJORVERSION, Win32Native.VER_GREATER_EQUAL);
conditionMask = Win32Native.VerSetConditionMask(conditionMask, Win32Native.VER_MINORVERSION, Win32Native.VER_GREATER_EQUAL);
conditionMask = Win32Native.VerSetConditionMask(conditionMask, Win32Native.VER_SERVICEPACKMAJOR, Win32Native.VER_GREATER_EQUAL);
conditionMask = Win32Native.VerSetConditionMask(conditionMask, Win32Native.VER_SERVICEPACKMINOR, Win32Native.VER_GREATER_EQUAL);
// Windows 8 version is 6.2
var version = new Win32Native.OSVERSIONINFOEX();
version.dwOSVersionInfoSize = sizeof(Win32Native.OSVERSIONINFOEX);
version.dwMajorVersion = 6;
version.dwMinorVersion = 2;
version.wServicePackMajor = 0;
version.wServicePackMinor = 0;
isWindows8OrAbove = Win32Native.VerifyVersionInfoW(ref version,
Win32Native.VER_MAJORVERSION | Win32Native.VER_MINORVERSION | Win32Native.VER_SERVICEPACKMAJOR | Win32Native.VER_SERVICEPACKMINOR,
conditionMask);
}
return(isWindows8OrAbove);
}
static Win32()
{
Win32Native.OSVERSIONINFO osVer1 = new Win32Native.OSVERSIONINFO();
if (!Environment.GetVersion(osVer1))
{
throw new SystemException(Environment.GetResourceString("InvalidOperation_GetVersion"));
}
if (osVer1.MajorVersion > 5 || osVer1.MinorVersion > 0)
{
System.Security.Principal.Win32._LsaLookupNames2Supported = true;
System.Security.Principal.Win32._WellKnownSidApisSupported = true;
}
else
{
System.Security.Principal.Win32._LsaLookupNames2Supported = false;
Win32Native.OSVERSIONINFOEX osVer2 = new Win32Native.OSVERSIONINFOEX();
if (!Environment.GetVersionEx(osVer2))
{
throw new SystemException(Environment.GetResourceString("InvalidOperation_GetVersion"));
}
if ((int)osVer2.ServicePackMajor < 3)
{
System.Security.Principal.Win32._WellKnownSidApisSupported = false;
}
else
{
System.Security.Principal.Win32._WellKnownSidApisSupported = true;
}
}
}
static Win32()
{
Win32Native.OSVERSIONINFO osversioninfo = new Win32Native.OSVERSIONINFO();
if (!Environment.GetVersion(osversioninfo))
{
throw new SystemException(Environment.GetResourceString("InvalidOperation_GetVersion"));
}
if (osversioninfo.MajorVersion > 5 || osversioninfo.MinorVersion > 0)
{
Win32._LsaLookupNames2Supported = true;
Win32._WellKnownSidApisSupported = true;
return;
}
Win32._LsaLookupNames2Supported = false;
Win32Native.OSVERSIONINFOEX osversioninfoex = new Win32Native.OSVERSIONINFOEX();
if (!Environment.GetVersionEx(osversioninfoex))
{
throw new SystemException(Environment.GetResourceString("InvalidOperation_GetVersion"));
}
if (osversioninfoex.ServicePackMajor < 3)
{
Win32._WellKnownSidApisSupported = false;
return;
}
Win32._WellKnownSidApisSupported = true;
}
[System.Security.SecuritySafeCritical] // auto-generated
static Win32()
{
Win32Native.OSVERSIONINFO osvi = new Win32Native.OSVERSIONINFO();
bool r = Environment.GetVersion(osvi);
if (!r)
{
Contract.Assert(r, "OSVersion native call failed.");
throw new SystemException(Environment.GetResourceString("InvalidOperation_GetVersion"));
}
if (osvi.MajorVersion > 5 || osvi.MinorVersion > 0) // Windows XP/2003 and above
{
//
// LsaLookupNames2 supported only on XP and Windows 2003 and above
//
_LsaLookupNames2Supported = true;
_WellKnownSidApisSupported = true;
}
else
{
// Win2000
_LsaLookupNames2Supported = false;
//
// WellKnownSid apis are only supported on Windows 2000 SP3 and above
// (so we need sp info)
//
Win32Native.OSVERSIONINFOEX osviex = new Win32Native.OSVERSIONINFOEX();
r = Environment.GetVersionEx(osviex);
if (!r)
{
Contract.Assert(r, "OSVersion native call failed");
throw new SystemException(Environment.GetResourceString("InvalidOperation_GetVersion"));
}
if (osviex.ServicePackMajor < 3)
{
_WellKnownSidApisSupported = false;
}
else
{
_WellKnownSidApisSupported = true;
}
}
}
internal static extern bool GetVersionEx(Win32Native.OSVERSIONINFOEX osVer);
