System.Net.Sockets.OverlappedAsyncResult.GetSocketAddressPtr C# (CSharp) Method

        internal IntPtr GetSocketAddressPtr()
        {
            return Marshal.UnsafeAddrOfPinnedArrayElement(_socketAddress.Buffer, 0);
        }

        public static unsafe SocketError ReceiveFromAsync(SafeCloseSocket handle, byte[] buffer, int offset, int count, SocketFlags socketFlags, Internals.SocketAddress socketAddress, OverlappedAsyncResult asyncResult)
        {
            // Set up asyncResult for overlapped WSARecvFrom.
            // This call will use completion ports on WinNT and Overlapped IO on Win9x.
            asyncResult.SetUnmanagedStructures(buffer, offset, count, socketAddress, true);

            int         bytesTransferred;
            SocketError errorCode = Interop.Winsock.WSARecvFrom(
                handle,
                ref asyncResult._singleBuffer,
                1,
                out bytesTransferred,
                ref socketFlags,
                asyncResult.GetSocketAddressPtr(),
                asyncResult.GetSocketAddressSizePtr(),
                asyncResult.OverlappedHandle,
                IntPtr.Zero);

            if (errorCode != SocketError.Success)
            {
                errorCode = GetLastSocketError();
            }

            return(errorCode);
        }