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Performance of basic RichTextBox in .NET 4.0

Posted By:      Posted Date: October 04, 2010    Points: 0   Category :WPF

I am developing a text editor using RichTextBox out-of-the-box. Even when compiling to Release mode I've noticed a "lag" between keystrokes and the responsive display of characters. This gives a user experience with the appearance of poor performance, unlike when using other text editors i.e. Microsoft Word, Notepad, Visual Studio, Notepad++ etc. There are no options or event-handling I know of that would create this delay in display response. I am not attaching any extra features such as syntax highlighting or formatting when the text changes. For example, here is the code I'm using:

The Style:


<Style TargetType="{x:Type RichTextBox}">
      <Setter Property="FontSize" Value=

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