/// <summary>
/// Adds an item to the collection and selects it.
/// </summary>
/// <param name="item">The object to add.</param>
public virtual void AddAndSelect(T item)
{
ItemsCore.Add(item);
SelectedIndex = ItemsCore.Count - 1;
}
/// <summary>
/// Adds an item to the <see cref="T:System.Collections.Generic.ICollection`1" />.
/// </summary>
/// <param name="item">The object to add to the <see cref="T:System.Collections.Generic.ICollection`1" />.</param>
public virtual void Add(T item)
{
ItemsCore.Add(item);
}