public static bool VerifyOSDependency(ref PlatformDetector.OSDependency osd)
{
OperatingSystem osVersion = Environment.OSVersion;
if ((long)osVersion.Version.Major == 4L)
{
return((long)osVersion.Version.Major >= (long)osd.dwMajorVersion);
}
NativeMethods.OSVersionInfoEx osvi = new NativeMethods.OSVersionInfoEx();
osvi.dwOSVersionInfoSize = (uint)Marshal.SizeOf((object)osvi);
osvi.dwMajorVersion = osd.dwMajorVersion;
osvi.dwMinorVersion = osd.dwMinorVersion;
osvi.dwBuildNumber = osd.dwBuildNumber;
osvi.dwPlatformId = 0U;
osvi.szCSDVersion = (string)null;
osvi.wServicePackMajor = osd.wServicePackMajor;
osvi.wServicePackMinor = osd.wServicePackMinor;
osvi.wSuiteMask = osd.suiteName != null ? (ushort)PlatformDetector.NameMap.MapNameToMask(osd.suiteName, (PlatformDetector.NameMap[])PlatformDetector.Suites) : (ushort)0;
osvi.bProductType = osd.productName != null ? (byte)PlatformDetector.NameMap.MapNameToMask(osd.productName, (PlatformDetector.NameMap[])PlatformDetector.Products) : (byte)0;
osvi.bReserved = (byte)0;
ulong ConditionMask = 0;
uint dwTypeMask = (uint)(2 | ((int)osd.dwMinorVersion != 0 ? 1 : 0) | ((int)osd.dwBuildNumber != 0 ? 4 : 0) | (osd.suiteName != null ? 64 : 0) | (osd.productName != null ? 128 : 0) | ((int)osd.wServicePackMajor != 0 ? 32 : 0) | ((int)osd.wServicePackMinor != 0 ? 16 : 0));
ulong num = NativeMethods.VerSetConditionMask(ConditionMask, 2U, (byte)3);
if ((int)osd.dwMinorVersion != 0)
{
num = NativeMethods.VerSetConditionMask(num, 1U, (byte)3);
}
if ((int)osd.dwBuildNumber != 0)
{
num = NativeMethods.VerSetConditionMask(num, 4U, (byte)3);
}
if (osd.suiteName != null)
{
num = NativeMethods.VerSetConditionMask(num, 64U, (byte)6);
}
if (osd.productName != null)
{
num = NativeMethods.VerSetConditionMask(num, 128U, (byte)1);
}
if ((int)osd.wServicePackMajor != 0)
{
num = NativeMethods.VerSetConditionMask(num, 32U, (byte)3);
}
if ((int)osd.wServicePackMinor != 0)
{
num = NativeMethods.VerSetConditionMask(num, 16U, (byte)3);
}
bool flag = NativeMethods.VerifyVersionInfo(osvi, dwTypeMask, num);
if (!flag)
{
int lastWin32Error = Marshal.GetLastWin32Error();
if (lastWin32Error != 1150)
{
throw new Win32Exception(lastWin32Error);
}
}
return(flag);
}
public OSDependency(NativeMethods.OSVersionInfoEx osvi)
{
this.dwMajorVersion = osvi.dwMajorVersion;
this.dwMinorVersion = osvi.dwMinorVersion;
this.dwMajorVersion = osvi.dwBuildNumber;
this.dwMajorVersion = (uint)osvi.wServicePackMajor;
this.dwMajorVersion = (uint)osvi.wServicePackMinor;
this.suiteName = PlatformDetector.NameMap.MapMaskToName((uint)osvi.wSuiteMask, (PlatformDetector.NameMap[])PlatformDetector.Suites);
this.productName = PlatformDetector.NameMap.MapMaskToName((uint)osvi.bProductType, (PlatformDetector.NameMap[])PlatformDetector.Products);
}
public static extern bool VerifyVersionInfo([In, Out] NativeMethods.OSVersionInfoEx osvi, [In] uint dwTypeMask, [In] ulong dwConditionMask);