0x00.相关

• Win UI 3.0
• ContentDialog
• XamlRoot

0x01.现象

使用win ui 3.0，创建content dialog，使用showasync()，报错Value does not fall within the expected range.

                            ContentDialog contentDialog = new ContentDialog();
                            contentDialog.Content = new RSSEditContentDialog();
                            var res = contentDialog.ShowAsync();

0x02.纠正方法

                            ContentDialog contentDialog = new ContentDialog();
                            contentDialog.Content = new RSSEditContentDialog();
                            contentDialog.XamlRoot = Content.XamlRoot;//增加这一行
                            var res = contentDialog.ShowAsync();