public void AddRange(HTMLElement[] value)
 {
     for (int i = 0; i <= value.Length - 1; i++)
     {
         Add(value[i]);
     }
 }
        //Remove

        public void CopyTo(HTMLElement[] array, int index)
        {
            List.CopyTo(array, index);
        }
 public void Remove(HTMLElement value)
 {
     List.Remove(value);
 }
 public void Insert(int index, HTMLElement value)
 {
     List.Insert(index, value);
 }
 public bool Contains(HTMLElement value)
 {
     return this.List.Contains(value);
 }
 public int IndexOf(HTMLElement value)
 {
     return this.List.IndexOf(value);
 }
 public int Add(HTMLElement value)
 {
     int index = this.List.Add(value);
     return index;
 }