private void UpdateCaptionText(int activeTabIndex)
        {
            string newCaptionText;

            // Don't support non-MdiTabPages here.
            if (activeTabIndex < 0 || !(TabPages[activeTabIndex] is MdiTabPage mdiTabPage))
            {
                newCaptionText = ApplicationTitle;
            }
            else if (mdiTabPage.DockedControl.DockProperties.IsModified)
            {
                newCaptionText = $"{ModifiedMarkerCharacter} {mdiTabPage.Text} - {ApplicationTitle}";
            }
            else
            {
                newCaptionText = $"{mdiTabPage.Text} - {ApplicationTitle}";
            }

            if (DockProperties.CaptionText != newCaptionText)
            {
                DockProperties.CaptionText = newCaptionText;
                DockPropertiesChanged?.Invoke();
            }
        }
 public void UpdateText()
 {
     DockProperties.CaptionText = StringUtilities.ConditionalFormat(titleString.DisplayText.Value, new[] { OwnerEditor.CodeFilePathDisplayString });
     DockPropertiesChanged?.Invoke();
 }