How to get caret/cursor position in RichTextBox in WPF?

Question

I want to get the Caret position in RichTextBox in WPF when I change my cursor with Left Click Mouse Button and this picture below shows this.

Answer 1

Get position:

TextPointer tp = EditMessageRTB.Selection.Start; 

Set position:

RichTextBox.CaretPosition = tp;

If want to set position to end:

RichTextBox.CaretPosition = RichTextBox.Document.Blocks.LastBlock.ContentEnd;