System.Net.Sockets.SocketAsyncEventArgs.SetupOverlappedMultiple C# (CSharp) Method

        unsafe private void SetupOverlappedMultiple()
        {
            ArraySegment<byte>[] tempList = new ArraySegment<byte>[_bufferList.Count];
            _bufferList.CopyTo(tempList, 0);

            // Number of things to pin is number of buffers.
            // Ensure we have properly sized object array.
            if (_objectsToPin == null || (_objectsToPin.Length != tempList.Length))
            {
                _objectsToPin = new object[tempList.Length];
            }

            // Fill in object array.
            for (int i = 0; i < (tempList.Length); i++)
            {
                _objectsToPin[i] = tempList[i].Array;
            }

            if (_wsaBufferArray == null || _wsaBufferArray.Length != tempList.Length)
            {
                _wsaBufferArray = new WSABuffer[tempList.Length];
            }

            // Pin buffers and fill in WSABuffer descriptor pointers and lengths.
            _preAllocatedOverlapped = new PreAllocatedOverlapped(CompletionPortCallback, this, _objectsToPin);
            if (NetEventSource.IsEnabled) NetEventSource.Info(this, $"new PreAllocatedOverlapped.{_preAllocatedOverlapped}");

            for (int i = 0; i < tempList.Length; i++)
            {
                ArraySegment<byte> localCopy = tempList[i];
                RangeValidationHelpers.ValidateSegment(localCopy);
                _wsaBufferArray[i].Pointer = Marshal.UnsafeAddrOfPinnedArrayElement(localCopy.Array, localCopy.Offset);
                _wsaBufferArray[i].Length = localCopy.Count;
            }
            _pinState = PinState.MultipleBuffer;
        }