C# wrong data in socket programming

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C#

network

sockets

Hello,

I've been developing simple remote desktop program sending, receiving screen images between server, client and doing mouse control, keyboard control.
when I attempted to send server mouse X,Y position to client to control, client received wrong data. ex) server sends data which is MouseControl$Position$10(Mouse_X_Position)$10(Mouse_Y_Position)$450(pictureBox.Width)$450(pictureBox.Height). it works well at first, client receives the same data that server sent. But, a few seconds later client receives data like ntrol$Position$10(Mouse_X_Position)$10(Mouse_Y_Position)$450(pictureBox.Width)$450(pictureBox.Height). Some part of The first word "MouseControl" is disappeared while server still sends right data "MouseControl$Position$10(Mouse_X_Position)$10(Mouse_Y_Position)$450(pictureBox.Width)$450(pictureBox.Height)"

Help me out of this trouble. I want to know why it is happening
Thank you in advance!

Here is my code below


-server
private void StartMouseControl()
{
NetworkStream MouseControlStream = MouseControlDataSock.GetStream();
byte[] buffer = null;

while (true)
{
Point PointXY = pictureBox1.PointToClient(new Point(Control.MousePosition.X, Control.MousePosition.Y));
int MouseX = PointXY.X;
int MouseY = PointXY.Y;

/* when mouse pointer in pictureBox ... */
if ((MouseX >= 0 && MouseX <= pictureBox1.Width) && (MouseY >= 0 && MouseY <= pictureBox1.Height))
{
MouseControlStream.Flush();
buffer = Encoding.Unicode.GetBytes("MouseControl$Postion$" + MouseX.ToString() + "$" + MouseY.ToString() + "$" + pictureBox1.Width.ToString() + "$" + pictureBox1.Height.ToString());
MouseControlStream.Write(buffer, 0, buffer.Length);
MouseControlStream.Flush();
}

Thread.Sleep(400);
}
}




-client
private void StartMouseControl()
{
int BUFFERSIZE = 72;
int read;
byte[] buffer = new byte[BUFFERSIZE];

while (MouseControlDataSock.Connected)
{
/* seperate protocol data from server and save in Sep_message[] */
MouseControlstream = MouseControlDataSock.GetStream();

read = 0;
while (read < buffer.Length)
{
int readbyte = MouseControlstream.Read(buffer, read, buffer.Length - read);
if (readbyte == 0)
{
break;
}
read += readbyte;
}
MouseControlstream.Flush();

string message = Encoding.Unicode.GetString(buffer, 0, read);

string splitter = "$";
char[] split = splitter.ToArray();

string[] Sep_message = message.Split(split, StringSplitOptions.RemoveEmptyEntries);

if (Sep_message[0].Equals("MouseControl"))
{
if (Sep_message[1].Equals("Postion"))
{
// Mouse_X_Position, Mouse_Y_Position, pictureBox.Width, pictureBox.Height
int MouseX_FromServer = int.Parse(Sep_message[2]);
int MouseY_FromServer = int.Parse(Sep_message[3]);
int PicBoxWidth_FromServer = int.Parse(Sep_message[4]);
int PicBoxHeight_FromServer = int.Parse(Sep_message[5]);
}
}

Thread.Sleep(100);
}
}

What I have tried:

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