Wpf's RichTextBox alternative
c#, wpf
Solution
You can try AvalonEdit (http://avalonedit.net). Although it only supports text, it may be what you are looking for.
I have tried it and it is blazingly fast compared to the built-in WPF rich text box.
Problem
`RichTextBox` lags really hard (at least under Windows7 64 bit)- I found several topics on many programming boards, describing this exact problem, but no solution. There's even a bug report on this issue for the WPF team. Some people suggested that setting `SpellCheck.IsEnabled` to `false` may help, but in my case it didn't... So - are there any good alternatives for the `RichTextBox` control? I need to be able to highlight specific words in large amounts of text and do this dynamically (during user typing, changing text).