System.IO.FileStream.OnBufferAllocated C# (CSharp) Method

        partial void OnBufferAllocated()
        {
            Debug.Assert(_buffer != null);
            Debug.Assert(_preallocatedOverlapped == null);

            if (_useAsyncIO)
                _preallocatedOverlapped = new PreAllocatedOverlapped(s_ioCallback, this, _buffer);
        }