Insert or Update in Castle ActiveRecord

Is there a built-in way to do an "insert-or-update"开发者_Go百科 in Castle ActiveRecord?

Something along the lines of:

try
{
  ActiveRecordMediator<TEntity>.Create(e);
}
catch (Exception)
{
  ActiveRecordMediator<TEntity>.Update(e);
}

ActiveRecordMediator<Foo>.Save(foo);