[SOLVED]Textbox.Lines property

[mindloop]

Hey, i need to simulate a console in my prog and am using for this a textbox to display some information. I'm using the following code

private int lineCount=0;
private void addLine(string newline)
		{
			
			if (lineCount >=20)
			{
				for (int i=0;i<20;i++)
				{
					pInfo.Lines[i]=pInfo.Lines[i+1];
					
				}
				pInfo.Lines[20]=newline;

			}
			else 
			{
				pInfo.Lines[lineCount]=newline;
				lineCount++;
				
			}
		}

The problem is that mytextbox.Lines[lineindex]=somestring just dont do anything it's like this property is readonly.
any workarounds ? is this the way textbox.lines[] property should behave ?

EDIT:
solved: http://www.vbforums.com/showthread.p...89241&posted=1