Search result in a collasped region

 public override object GetCollapsedContent(IOutliningNode node)
        {
            // Get the node's snapshot range
            TextSnapshotRange snapshotRange = node.SnapshotRange;

            // Use the text in the first line
            int lineEndOffset = snapshotRange.StartLine.EndOffset;
            return snapshotRange.Snapshot.GetSubstring(new TextRange(snapshotRange.StartOffset, lineEndOffset)) + "[..]";
        }

public void SyntaxEditor_ViewSearch(object sender, RoutedEventArgs e)
{

 ISearchResultSet resultSet = args.ResultSet;

                SyntaxEditor editor = sender as SyntaxEditor;
                
                if (null != resultSet)
                {
                    // Get the region manager to determine if this result is within a collapsed region
                    ICollapsedRegionManager regionManager = editor.ActiveView.CollapsedRegionManager;

                    // get the snapshot
                    ITextSnapshot snapShot = editor.ActiveView.CurrentSnapshot;

                    // Store the offset of the current word
                    TextSnapshotOffset offset = new TextSnapshotOffset(snapShot, editor.ActiveView.GetCurrentWordTextRange().StartOffset);

                    TextSnapshotRange textSnapshotRange = regionManager.GetCollapsedRange(offset);

                    // Check
                    if (!textSnapshotRange.IsDeleted)
                    {
                        // This word is hidden within a collapsed region
                        IEditAction action = new ToggleOutliningExpansionAction();

                        // Open the region
                        if (action.CanExecute(editor.ActiveView))
                        {
                            editor.ActiveView.ExecuteEditAction(action);
                        }
                    }
                }

                editor.Focus();

}