private void textBoxInput_KeyUp(object sender, KeyEventArgs e)
 {
     if (e.Key == Key.LeftShift || e.Key == Key.RightShift)
     {
         WritingAnalytics.ShiftPressed(false);
     }
 }
 private void textBoxInput_TextChanged(object sender, TextChangedEventArgs e)
 {
     WritingAnalytics.AnalizeReadyText(currentInput, textBoxInput.Text);
     WritingAnalytics.AnalizeFreshInput(currentInput, textBoxInput.Text);
 }