I found an example, how to show the LineNumbers from a RichTextBox in Windows Forms. http://www.codeproject.com/Articles/38858/Line-Numbers-for-RichText-Control-in-C

Have somebody an example for it in WPF?

Edit:

Does someone have work with AvalonEdit, because he wanted to show LineNumbers in his Programm and can help me by my Problem.

c# wpf richtextbox line-numbers
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