public void Add(object content)
{
AddContent(content);
if (_text != null)
{
if (_parent.content == null)
{
if (_parent.SkipNotify())
{
_parent.content = _text;
}
else
{
if (_text.Length > 0)
{
InsertNode(new XText(_text));
}
else
{
if (_parent is XElement)
{
// Change in the serialization of an empty element:
// from empty tag to start/end tag pair
_parent.NotifyChanging(_parent, XObjectChangeEventArgs.Value);
if (_parent.content != null)
{
throw new InvalidOperationException(SR.InvalidOperation_ExternalCode);
}
_parent.content = _text;
_parent.NotifyChanged(_parent, XObjectChangeEventArgs.Value);
}
else
{
_parent.content = _text;
}
}
}
}
else if (_text.Length > 0)
{
XText prevXText = _previous as XText;
if (prevXText != null && !(_previous is XCData))
{
prevXText.Value += _text;
}
else
{
_parent.ConvertTextToNode();
InsertNode(new XText(_text));
}
}
}
}