I have a string(as StringBuilder) of 35,660 characters that I put into a textbox. The problem is that it is slow. AT first I thought my problem was the .tostring of the stringbuilder but that was not the case. In the end I created a rich textbox and executed the following in the debugger

tstRTB.Text = lstANSa(pANS.Value).ToString 'rich textbox
txtFOC.Text = lstANSa(pANS.Value).ToString 'textbox


The rich textbox example executes as soon as you press F8. The textbox version takes seconds.

What am I missing. BTW - I reversed the order of the statements but the results were the same.