C#: LinkList

using System;
using System.Collections.Generic;
using System.Text;

namespace List
{
[Serializable]
class LinkList<T>
{
int numOfElements = 0;
ListNode<T> headNode = null;
public LinkList() { }
public LinkList(T data) {
headNode = new ListNode<T>(data);
}
public bool isEmpty()
{
return (numOfElements == 0);
}
public int getNumOfElements()
{
return numOfElements;
}
public ListNode<T> find(int index)
{
ListNode<T> node = headNode;
if(index < 0 || index >= numOfElements){
throw new IndexOutOfRangeException("Error! Out of List index bounds");
}
for (int i = 0; i < index; i++ )
{
node = node.Next;
}
return node;
}
public T get(int index)
{
/*
if (index >= 0 && index < numOfElements)
{
return find(index).Data;
}*/
return find(index).Data;
}
public void add(int index, T data)
{
if (index == 0)
{
ListNode<T> newNode = new ListNode<T>(data, headNode);
headNode = newNode;
}
else if (index > 0 && index <= numOfElements)
{
ListNode<T> prevNode = find(index - 1);
ListNode<T> newNode = new ListNode<T>(data, prevNode.Next);
prevNode.Next = newNode;
}else{
throw new IndexOutOfRangeException("Error! Out of List index bounds");
}
numOfElements++;
}
public void addLast(T data)
{
add(getNumOfElements(), data);
}
public void remove(int index)
{
if (index == 0)
{
headNode = headNode.Next;
}
else if (index > 0 && index < numOfElements)
{
ListNode<T> prev = find(index - 1);
ListNode<T> current = prev.Next;
prev.Next = current.Next;
}
else
{
throw new IndexOutOfRangeException("Error! Out of List index bounds");
}
numOfElements--;
}
public void removeLast()
{
remove(numOfElements - 1);
}
}
}