/// <summary>
/// 判斷指定特性物件是否存在集合內
/// </summary>
/// <param name="item">特性物件</param>
/// <returns>如果特性物件在集合中則為 true，否則為 false。</returns>
public bool Contains(PropertyBase item)
{
return(_Collection.Contains(item));
}
/// <summary>
/// 新增特性生效延遲器
/// </summary>
/// <param name="duration">持續時間(毫秒),小於0為永久</param>
/// <param name="property">要延遲生效的特性</param>
public PropertyDelay(int duration, PropertyBase property)
{
DurationTime.Limit = duration;
Property = property;
}