Question

I’m making a small text editor as part of a larger application. So I’ve taken an RichTextBox and added an tool strip with some buttons. Actually everything works well with the editing part. My app requires the addition of a DateTime stamp in the textbox every time a button is clicked. When I do so, the entire markup is gone.

So what I do is:

 private void button_click(object sender, EventArgs e)
 {
    richtextbox1.text += DateTime.Now.toString();
 }

Answer 1

Manual:

To read or set the text of a multiline text box, use the Lines property. The Text property does not return any information about the formatting applied to the contents of the RichTextBox. To get the rich text formatting (RTF) codes, use the Rtf property.