Как избежать Marshal.Copy для отправки данных

public int Send(byte[] buffer, SocketFlags socketFlags)
{
    return this.Send(buffer, 0, (buffer != null) ? buffer.Length : 0, socketFlags);
}
 
public int Send(byte[] buffer, int offset, int size, SocketFlags socketFlags)
{
    SocketError error;
    int num = this.Send(buffer, offset, size, socketFlags, out error);
    if (error != SocketError.Success)
    {
        throw new SocketException(error);
    }
    return num;
}
 
public unsafe int Send(byte[] buffer, int offset, int size, SocketFlags socketFlags, out SocketError errorCode)
{
    int num;
    if (s_LoggingEnabled)
    {
        Logging.Enter(Logging.Sockets, this, "Send", "");
    }
    if (this.CleanedUp)
    {
        throw new ObjectDisposedException(base.GetType().FullName);
    }
    if (buffer == null)
    {
        throw new ArgumentNullException("buffer");
    }
    if ((offset < 0) || (offset > buffer.Length))
    {
        throw new ArgumentOutOfRangeException("offset");
    }
    if ((size < 0) || (size > (buffer.Length - offset)))
    {
        throw new ArgumentOutOfRangeException("size");
    }
    errorCode = SocketError.Success;
    this.ValidateBlockingMode();
    if (buffer.Length == 0)
    {
        num = UnsafeNclNativeMethods.OSSOCK.send(this.m_Handle.DangerousGetHandle(), null, 0, socketFlags);
    }
    else
    {
        fixed (byte* numRef = buffer)
        {
            // Угу, совсем не так работает...
            num = UnsafeNclNativeMethods.OSSOCK.send(this.m_Handle.DangerousGetHandle(), numRef + offset, size, socketFlags);
        }
    }
    if (num == -1)
    {
        errorCode = (SocketError) Marshal.GetLastWin32Error();
        this.UpdateStatusAfterSocketError(errorCode);
        if (s_LoggingEnabled)
        {
            Logging.Exception(Logging.Sockets, this, "Send", new SocketException(errorCode));
            Logging.Exit(Logging.Sockets, this, "Send", 0);
        }
        return 0;
    }
    if (s_PerfCountersEnabled && (num > 0))
    {
        NetworkingPerfCounters.AddBytesSent(num);
        if (this.Transport == TransportType.Udp)
        {
            NetworkingPerfCounters.IncrementDatagramsSent();
        }
    }
    if (s_LoggingEnabled)
    {
        Logging.Dump(Logging.Sockets, this, "Send", buffer, offset, size);
    }
    if (s_LoggingEnabled)
    {
        Logging.Exit(Logging.Sockets, this, "Send", num);
    }
    return num;
}