Best way to Dispose List<T>

Question

i did this way....is it good approach or not ? i use TrimExcess() is it good practice. please guide me. thanks

public static void ListDispose<T>(this List<T> _list)
        {
            if (_list != null)
            {
                _list.Clear();
                _list.TrimExcess();
                _list = null;
            }
        }

Answer 1

You can find some threads in MSDN forums archives, like :
What List TrimExcess() does and when to use it