private static OSVersion GetOSVersion()
{
const string BCRYPT_LIB = "bcrypt.dll";
SafeLibraryHandle bcryptLibHandle = null;
try
{
bcryptLibHandle = SafeLibraryHandle.Open(BCRYPT_LIB);
}
catch
{
// we'll handle the exceptional case later
}
if (bcryptLibHandle != null)
{
using (bcryptLibHandle)
{
if (bcryptLibHandle.DoesProcExist("BCryptKeyDerivation"))
{
// We're running on Win8+.
return(OSVersion.Win8OrLater);
}
if (bcryptLibHandle.DoesProcExist("BCryptDeriveKeyPBKDF2"))
{
// We're running on Win7+.
return(OSVersion.Win7OrLater);
}
// We're running on Vista+.
return(OSVersion.WinVistaOrLater);
}
}
else
{
// Not running on Win7+.
return(OSVersion.NotWindows);
}
}