System.Collections.ListDictionaryInternal.Remove C# (CSharp) Method

        public void Remove(Object key) {
            if (key == null) {
                throw new ArgumentNullException("key", Environment.GetResourceString("ArgumentNull_Key"));
            }
            version++;
            DictionaryNode last = null;
            DictionaryNode node;
            for (node = head; node != null; node = node.next) {
                if (node.key.Equals(key)) {
                    break;
                } 
                last = node;
            }
            if (node == null) {
                return;
            }          
            if (node == head) {
                head = node.next;
            } else {
                last.next = node.next;
            }
            count--;
        }