public void RemoveItem(PivotGameItem pgi)
{
Items.Remove(pgi);
}
/// <summary>
/// Adds a new item to the pivot pages collection.
/// </summary>
/// <param name="pgi">The item to add.</param>
public void AddItem(PivotGameItem pgi)
{
Items.Add(pgi);
pgi.Parent = this;
}