void BeforeChange()
{
JsonMonitor m = RetrieveMonitor();
if (m != null)
{
if (m.IsReadOnly)
{
throw new InvalidOperationException("Marked as read-only");
}
m.IsModified = true;
}
}
public JsonMonitor CreateMonitor()
{
if (m_Parent != null)
{
throw new InvalidOperationException("CreateMonitor is only allowed for the root node");
}
if (m_Monitor != null)
{
throw new InvalidOperationException("CreateMonitor must not be called several times");
}
m_Monitor = new JsonMonitor();
return(m_Monitor);
}