/// <summary>
        /// Valueプロパティが変更された際の処理
        /// </summary>
        /// <param name="target">対象</param>
        /// <param name="e">イベント情報</param>
        private static void OnSetFormatCallback(DependencyObject target, DependencyPropertyChangedEventArgs e)
        {
            var textbox = target as TextBox;
            var value   = WpfUtil.GetIsNotNull(GetValue(textbox), textbox.Text, "0");

            BehaviorUtil.Loaded(textbox,
                                (sender, tmp) => SetText(textbox, double.Parse(value))
                                );
        }