Chat Application

 Hi
Im Developing a 1 to 1 Chat application, i've used 2 forms where admin and user will interact, here i've used diffrent forms for each, a class which handles the converzation, but here when eve i enter some text and enter the array im using is refreshed, and im loosing the previous value, how can i syncronize. here is the code
protected void Chat()
    {
        try
        {
            ChatMessage Ch = new ChatMessage();          
            Ch.AddMessage("<br /><b>" + Session["User"].ToString() + "</b> : " + TextBoxInput.Text + "<br />");
            LabelMain.Te ...