test.cs

public DocumentComparison(TXTextControl.TextControl originalDocument, TextControl revisedDocument)
{
  // Initialize document references
  m_originalDocument = originalDocument;
  m_revisedDocument = revisedDocument;

  // Enable track changes in the original document
  originalDocument.IsTrackChangesEnabled = true;

  // Compare paragraphs between the original and revised documents
  for (int p = 1; p <= m_originalDocument.Paragraphs.Count; p++)
  {
    var offsetSentences = 0;

    // Retrieve the original and revised paragraphs
    Paragraph originalParagraph = m_originalDocument.Paragraphs[p];

    if (p > m_revisedDocument.Paragraphs.Count)
      break; // Break if the revised document has fewer paragraphs than the original document

    Paragraph revisedParagraph = m_revisedDocument.Paragraphs[p];

    // Get the start position of the original paragraph
    var startParagraph = originalParagraph.Start;
    var uncheckedOffset = 0;

    // Check if the text of the original and revised paragraphs differ
    if (originalParagraph.Text != revisedParagraph.Text)
    {
      // Extract sentences from the original and revised paragraphs
      var originalSentences = ExtractSentences(originalParagraph.Text);
      var revisedSentences = ExtractSentences(revisedParagraph.Text);

      // Compare sentences and replace words in the original document
      for (int i = 0; i < originalSentences.Count; i++)
      {
        // Trim sentences and calculate offset
        var originalTrimOffset = originalSentences[i].Length - originalSentences[i].Trim().Length;
        var originalSentence = originalSentences[i].Trim();
        var revisedSentence = revisedSentences[i].Trim();

        // Track changes offset initialization
        int trackedChangeOffset = 0;

        var differences = CompareSentences(originalSentence, revisedSentence);

        // Check if there are any differences
        if (differences.Count == 0)
          uncheckedOffset = originalSentences[i].Length - 1;

        // Apply differences to the original document
        foreach (var difference in differences)
        {
          m_originalDocument.Selection.Start = trackedChangeOffset + startParagraph + offsetSentences +
                               difference.charIndex + originalTrimOffset + uncheckedOffset - 1;

          m_originalDocument.Selection.Length = difference.word.Length;
          m_originalDocument.Selection.Text = difference.replacedWord;

          trackedChangeOffset += difference.replacedWord.Length;
        }

        // Update offset for next sentence
        offsetSentences += originalSentences[i].Length + trackedChangeOffset;
      }
    }
    
  }
}