Visual C# TextBox

[RobberBaron]

I am trying to use the lines in a TextBox to copy the line index data to another textbox. My problem is, whenever I try to append text to the second textbox, I get an IndexOutOfRangeException (Index was outside the bounds of the array). Is there some way to append text, regardless of line position? Here is the code I am using:

private void textBox2_TextChanged(object sender, EventArgs e){	for (int _ = 0; _ < textBox2.Lines.Length; _++)	{		textBox1.Lines.SetValue(_.ToString(), _);	};}

[Farhadm]

Try it :

        string[] lines = TextBox2.Text.Split('\n');        for (int i = 0; i < lines.Length; i++)        {            TextBox1.Text += i.ToString() + '\n';        }

[RobberBaron]

Won't that just append to the text? I'm just trying it...EDIT: Yeah, that only seems to be adding 0 on to the end of the text every time a key is pressed...

[Farhadm]

Please send your project files to me, I corret it

[RobberBaron]

I don't want to add the numbers onto the end of the first TextBox, I want to update so that for every line in TextBox2, the corresponding line in TextBox1 will hold the line number.

[Farhadm]

This code clear textbox then update :

string[] lines = TextBox2.Text.Split('\n');TextBox2.Text="";for (int i = 0; i < lines.Length; i++){TextBox1.Text += i.ToString() + '\n';}

[RobberBaron]

Thanks, it almost works, but for some reason it won't register the newline. Wasn't there someway to get the newline character from Environment?EDIT: Oh yeah, Environment.NewLine. Thanks, work perfectly (although it is a bit slow at updating)