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我想在 C# 中为 XAML 应用程序制作 2 个单选按钮。如果您选中任一单选按钮,它应该会显示一条带有文本的对话框消息:您已选择+性别。但它似乎没有这样做。有任何想法吗?

public string gender = String.Empty;

IAsyncOperation<IUICommand> asyncCommand = null;

public async void WriteText2(object sender, RoutedEventArgs e)
{
    if (rb1.IsChecked == true)
        gender = "Male";
    else if (rb2.IsChecked == true)
        gender = "Female";

    var md = new MessageDialog("You have selected"+gender);
    asyncCommand = md.ShowAsync();
    await asyncCommand;
}
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