Generic List implementation

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

public class GenericList<T>
{
    private T[] elements;
    private int count = 0;

    public GenericList(int capacity)
    {
        this.elements = new T[capacity];
    }

    public void Add(T element)
    {
        if (count >= elements.Length)
        {
            StretchCapacity();
        }
        elements[count] = element;
        count++;
    }

    private void StretchCapacity()
    {
        T[] tempArray = new T[elements.Length * 2];
        Array.Copy(elements, 0, tempArray, 0, elements.Length);
        elements = tempArray;
    }

    public void Delete(T point)
    {
        int index = Array.IndexOf(elements,point);
        //T[] tempArray = (T[])elements.Clone();
        //elements = new T[tempArray.Length];
        //for (int i = 0, j = 0; i < tempArray.Length; i++, j++)
        //{
        //    if (i != index)
        //    {
        //        elements[j] = tempArray[i];
        //    }
        //    else
        //    {
        //        j--;
        //    }
        //}
        T[] tempArray = (T[])elements.Clone();
        elements = new T[tempArray.Length];
        Array.Copy(tempArray, index + 1, elements, index, elements.Length - index - 1);
        count--;
    }

    public int FindByValue(T element)
    {
        int myIndex = Array.IndexOf(elements, element);
        return myIndex; //return index ot the element
    }

    public void InsertElement(int position, T element)
    {
        if (count == elements.Length)
        {
            StretchCapacity();
        }
        //T[] tempArray = (T[])elements.Clone();
        //elements = new T[tempArray.Length];
        //for (int i = 0, j = 0; i < tempArray.Length; i++, j++)
        //{
        //    if (i != position)
        //    {
        //        elements[i] = tempArray[j];
        //    }
        //    else
        //    {
        //        elements[i] = element;
        //        j--;
        //    }
        //}
        Array.Copy(elements, position, elements, position + 1, elements.Length - position-1);
        elements[position] = element;
        count++;
    }

    public void Clear()
    {
        int length;
        length = elements.Length;
        elements = new T[length];
    }

    public override string ToString()
    {
        string concatenated = string.Join(",", elements.Select(x => x.ToString()).ToArray());
        return concatenated;
    }

    public T this[int index]
    {
        get
        {
            if (index >= count)
            {
                throw new IndexOutOfRangeException(String.Format(
                    "Invalid index: {0}.", index));
            }
            T result = elements[index];
            return result;
        }
    }
}