.net（winforms）的轻量级文本框控件

Is there any light version of richtextbox control? I've got to create like 300+ of them in an app which takes time, memory and slows everything down... All that I need is to have a control that will enable me changing the background/foreground of a part of the text... I'd need that in winforms... anybody know anything about some kind of replacement?Is there any light version of richtextbox contr