readonly List<TextNode> _spellCheckNodes = new List<TextNode>();

private void SpellCheck()
{
 _spellCheckNodes.Clear();

 AddTextNodes(richTextEditor.Document.RootNode.ChildNodes, _spellCheckNodes);

 AddBindingsToSpell();
}

private void AddTextNodes(NodeCollection nodes, IList<TextNode> textNodes)
{
 foreach (var node in nodes)
 {
  if (node is TextNode)
  {
   textNodes.Add(node);
  }
     
  if(node.HasChildNodes)
   AddTextNodes(node.ChildNodes, textNodes);
 }
}

private void AddBindingsToSpell()
{
 spellChecker.SpellCheckTargets.Clear();

 foreach (TextNode node in _spellCheckNodes)
 {
  Binding bind = new Binding("Text")
  {
   Source = node,
   Mode = BindingMode.TwoWay
  };

  spellChecker.SpellCheckTargets.Add(bind);
 }

 spellChecker.SpellCheck();
}

Rich text document parts are stored as TextNodes. If I applied different style to the part of some word, it would appear in two different textnodes. Thus it is not possible to correctly check spelling of the word.

Hello Darius,

Thank you for the provided code snippet.

Unfortunately, this behavior is expected. When you apply italic style to a word – two TextNode-s are created to hold the italic and normal part of the word.

That is the reason the word appears in two parts in the xamSpellChecker.

If you have any other questions on the matter, please feel free to ask.

Sincerely,