/// <summary>
/// 设置指定的元素.
/// </summary>
/// <param name="index"></param>
/// <param name="item"></param>
protected override void SetItem(int index, KeyedValue <T> item)
{
this.CheckReentrancy();
base.SetItem(index, item);
this.OnCollectionChanged(new NotifyCollectionChangedEventArgs(
NotifyCollectionChangedAction.Replace, item, index));
this.OnPropertyChanged("Count");
this.OnPropertyChanged("Item[]");
}
/// <summary>
/// 获取元素对应的键.
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
protected override string GetKeyForItem(KeyedValue <T> item)
{
return(item.Key);
}