/// <summary>
/// Modify a number element
/// </summary>
/// <param name="idx"></param>
/// <param name="ne"></param>
/// <remarks></remarks>
public void Modify(int idx, NumberElement ne)
{
if (content == null)
this.content = new List<NumberElement>();
if (idx < this.content.Count)
this.content[idx] = ne;
}
/// <summary>
/// Add a number element
/// </summary>
/// <param name="ne">The number element to add</param>
/// <remarks></remarks>
public void Add(NumberElement ne)
{
if (content == null)
this.content = new List<NumberElement>();
this.content.Add(ne);
}