突出显示文本后如何取消选择？

Question

The code below highlights the text after it is found, but my issues is I can't clear the the highlighted text when you search for a word that cant be found.

My question is how do I set the selection to empty so the text is no longer highlighted? code that Highlights the text after it is found:

 IsTextSelected = true;
 _body.Selection.Select(foundRange.Start, foundRange.End);
 _body.SelectionBrush = selectionHighlighter;
  newSearch = false;

Code when text is not found:

MessageBox.Show("\'" + searchBox.Text.Trim() + "\' not found!");
newSearch = true;
lastOffset = -1;
IsTextSelected = false;

Answer 1

For a TextBox, set the SelectionLength property to zero.

For a RichTextBox:

rtb.Selection.Select(rtb.Selection.Start, rtb.Selection.Start);