C＃分割并发送图像缓冲区

Question

我的问题在于通过udp发送图像字节，我严格地模仿了tcp而制作了一个api，但它也像udp一样工作，我想要的就是将图像拆分成块并将每个图像发送到服务器，最后一个长度是“剩下的”

客户端（发送方）

using (var stream = new MemoryStream())
                {
                    Frame.Save(stream, ImageFormat.Png);

                    byte[] ImageBuffer = stream.ToArray();
                    byte[] SendBuffer = new byte[400];

                    Client.QuickMessage("SI", ImageBuffer.Length); // Start Image, buffer length

                    int lastPacketPos = 0;
                    for (int lastCounter = 0; lastCounter <= ImageBuffer.Length - 400; lastCounter += 400)
                    {
                        Buffer.BlockCopy(ImageBuffer, lastCounter, SendBuffer, 0, 400);
                        Client.SecureMessage("IP", SendBuffer, true); // Image Packet, buffer
                        lastPacketPos = lastCounter;

                        Thread.Sleep(1);
                    }

                    SendBuffer = new byte[ImageBuffer.Length - lastPacketPos];
                    Buffer.BlockCopy(ImageBuffer, lastPacketPos, SendBuffer, 0, ImageBuffer.Length - (lastPacketPos));
                    Client.SecureMessage("LP", SendBuffer, true); // Last Packet, buffer
                }

服务器端（接收方）

byte[] ImageMemory;
    int bitCounter = 0;
    ShareScreenWindow ClientShareWindow = new ShareScreenWindow();
    private void Server_onReceivedData(string ClientName, string Message, object Obj)
    {
        if (Message == "SI")
        {
            ImageMemory = new byte[(int)Obj];
            Console.WriteLine("R " + (int)Obj);
            bitCounter = 0;
        }
        else if (Message == "IP")
        {
            Buffer.BlockCopy((byte[])Obj, 0, ImageMemory, bitCounter, ((byte[])Obj).Length);
            bitCounter += ((byte[])Obj).Length;
            Console.WriteLine(bitCounter);
        }
        else if (Message == "LP")
        {
            Buffer.BlockCopy((byte[])Obj, 0, ImageMemory, bitCounter, ((byte[])Obj).Length);
            using (MemoryStream ImageStream = new MemoryStream(ImageMemory))
            {
                ClientShareWindow.ShareImage.Image = Image.FromStream(ImageStream);
                ImageStream.Dispose();

            }
        }
    }

到目前为止没有任何效果，由于计数大于服务器端的缓冲区大小，或者发生drawing.dll错误，我遇到了各种错误，请帮忙！

消息按顺序发送，这不是问题