Two Problems of using Textbox Control in C #

1. How to Implement line feed when writing text in multi-line textbox?
In Windows, the carriage return must contain two characters. Therefore, the method is to use the/R/n mark, as shown in figure

Label = "calculation" + ":... sum/R/N ";
Textbox. appendtext (Label );

Another way is to use the environment. newline method, which is compatible with Windows and Linux systems.

2. How can I use a scroll bar in a multi-line textbox to automatically scroll to the last line after adding text?
The scrolltocaret method is used to automatically scroll to the position of the insert operator, for example:

Textbox. appendtext (Label );
Textbox. scrolltocaret ();