public SafeProvHandleImpl(IntPtr handle, bool addref)
: base(true)
{
if (!addref)
{
SetHandle(handle);
}
else
{
bool success;
int errorCode;
// Обеспечивает атомарность блока finally
RuntimeHelpers.PrepareConstrainedRegions();
try { }
finally
{
success = CryptoApi.CryptContextAddRef(handle, null, 0);
errorCode = Marshal.GetLastWin32Error();
if (success)
{
SetHandle(handle);
}
}
if (!success)
{
throw ExceptionUtility.CryptographicException(errorCode);
}
}
}