ways to Show formatted html content in a Text box

I have two Multiline Text boxes in my ASP.NET Web Application named Comments and History. History is readonly and Comments is the one which will be entered by user.
Now, the User is wants a richtext box functionality for comments section. That can be achieved if we can use either of CKEditor or Tinymce . 
But for the Hsitory part, its a bit tricky. since that is a text box we can't display formatted html in there(as user enters rich content in comments section which later goes into history section) . Now I am invstigating the ways to achieve this. PFB my thoughts and any suggestions or improvements will be of great help.
1. We can dynamically generate a div by replacing History Textbox and add the description which user enters and show it in Hostory. I am not sure how complex or easier is this.
2. We can replace history textbox with a label control as its only readonly.
Any other ways. pls comment.