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

        private void InnerStartOperationReceiveFrom()
        {
            // WSARecvFrom uses e a WSABuffer array describing buffers in which to 
            // receive data and from which to send data respectively. Single and multiple buffers
            // are handled differently so as to optimize performance for the more common single buffer case.
            //
            // For a single buffer:
            //   The Overlapped.UnsafePack method is used that takes a single object to pin.
            //   A single WSABuffer that pre-exists in SocketAsyncEventArgs is used.
            //
            // For multiple buffers:
            //   The Overlapped.UnsafePack method is used that takes an array of objects to pin.
            //   An array to reference the multiple buffer is allocated.
            //   An array of WSABuffer descriptors is allocated.
            //
            // WSARecvFrom and WSASendTo also uses a sockaddr buffer in which to store the address from which the data was received.
            // The sockaddr is pinned with a GCHandle to avoid having to use the object array form of UnsafePack.
            PinSocketAddressBuffer();
        }