I think that you are too stupid to answer my question. Read my question carefully and try to understand what it is before answer. Thanks.

I have a problem when I am programming in C#. I have a RichTextBox and in this RichTextBox, I put a sentence ( a string of characters). It is: " This program is edit by HieuNT". Now, I want to transform (move) this sentence from the botton to the top of this RichTextBox. How to I code for achieve this problem. Could you show me some others effect with string (of characters) or characters. Thank you very much!