private void tw_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
TextWorker tw = sender as TextWorker;
string newText = new TextRange(Modification.tb.Document.ContentStart, Modification.tb.Document.ContentEnd).Text;
string textToInsert = ((string)tw.Content).Remove(0, 2);
newText = newText.Remove(tw.startIndex, (tw.endIndex - tw.startIndex));
newText = newText.Insert(tw.startIndex, textToInsert);
FlowDocument doc = new FlowDocument();
Paragraph paragraph = new Paragraph();
paragraph.Inlines.Add(new Run(newText));
doc.Blocks.Add(paragraph);
Modification.tb.Document = doc;
Data = newText;
FindErrors();
Modification.sp.Children.Remove((UIElement)tw.Parent);
Update();
}