/// <summary>
/// Add values to multi valued entry.
/// If the entry is single valued, it is converted to the first
/// value of a multi valued entry.
/// The value will be (existing value[s] + the new value[s])
/// </summary>
/// <param name="name">The entry key.</param>
/// <param name="values">The List of multiple values.</param>
public void AppendValues(K name, ICollection <object> values)
{
object lo = _map.ContainsKey(name) ? _map[name] : null;
object ln = LazyList.AddCollection(lo, values);
if (lo != ln)
{
if (_map.ContainsKey(name))
{
_map[name] = ln;
}
else
{
_map.Add(name, ln);
}
}
}
