Removing lines from the top of a TextBox

[eanatum]

I am writing a telnet client and must set a maximum of lines in the main RichTextBox. The RichTextBox.Lines property does not seem to contain any property or method to delete actual lines of text. Is there any way to remove entire lines from the top of the text box?

[Tewl]

You can use substring

// remove first line
string mystring = rtb.Text;
rtb.Text = mystring.Substring(mystring.IndexOf("\n",0) + 1,mystring.Length - mystring.IndexOf("\n",0) - 1);

[eanatum]

Well, I have been applying color formatting to the RichTextBox. I have tried what you say before and other things like it but, when I do it this way, since I'm refilling the entire box, I lose all formatting. I must specifically find a way to remove the original lines from the top without refilling the box.

[Tewl]

hm try this

rtb.SelectionStart = 0;
rtb.SelectionLength = rtb.Text.IndexOf("\n",0) + 1;
rtb.SelectedText = "";