Any custom/third party Visual C# text box Controls with extra features?

I'm writing a program that uses the textbox in visual C# to read a log file. When dealing with very large amounts of text, writing to the textbox is incredibly slow. The textbox 开发者_JS百科also lacks many features. Are there any custom textbox controls that are faster, or even a sort of embedded editor (with ability to highlight certain words, indent, input bookmarks)? Many of the features I want are programmable, but it would be nice if there was a faster textbox or one that already had these features :)

Thanks.

You're looking for Scintilla and its .Net wrapper.

There are plenty, but most of the good ones are expensive. Telerik and DevExpress offer .Net control libraries with lots of extended features.