public static unsafe void Free(NativeOverlapped *nativeOverlappedPtr) { if (nativeOverlappedPtr == null) { throw new ArgumentNullException("nativeOverlappedPtr"); } Overlapped overlapped = OverlappedData.GetOverlappedFromNative(nativeOverlappedPtr).m_overlapped; OverlappedData.FreeNativeOverlapped(nativeOverlappedPtr); OverlappedData overlappedData = overlapped.m_overlappedData; overlapped.m_overlappedData = null; OverlappedDataCache.CacheOverlappedData(overlappedData); }