FairyGUI.InputTextField.GetSelection C# (CSharp) Method

        string GetSelection()
        {
            if (_selectionStart == null)
                return string.Empty;

            TextField.CharPosition cp = (TextField.CharPosition)_selectionStart;
            if (cp.caretIndex < _caretPosition)
                return textField.text.Substring(cp.caretIndex, _caretPosition - cp.caretIndex);
            else
                return textField.text.Substring(_caretPosition, cp.caretIndex - _caretPosition);
        }