WPF MetroDialog线程无法访问对象，因为其他线程拥有它
WPF MetroDialog thread can't access object because a different thread owns it

我正在尝试实现输入对话框，但似乎无法弄清楚为什么单击“确定”或“取消”时遇到线程问题。

下面是我创建对话框并显示它的代码段，我看了一些示例和答案，但是在这里我不知道自己在做什么错。

var metroDialogSettings = new MetroDialogSettings()
{
    AffirmativeButtonText = "OK",
    NegativeButtonText = "CANCEL",
    AnimateHide = true,
    AnimateShow = true,
    ColorScheme = MetroDialogColorScheme.Accented,
};

var dialog = new AddStorageAccountDialog(MainWindowHelper.mainWindow, metroDialogSettings);


await Application.Current.Dispatcher.Invoke(async () =>
{
    await MainWindowHelper.mainWindow.ShowMetroDialogAsync(dialog);
    await dialog.WaitForButtonPressAsync().ContinueWith((m) =>
    {
        MainWindowHelper.mainWindow.HideMetroDialogAsync(dialog);
    });

    var displayname = dialog.DisplayName;
    var accountname = dialog.AccountName;
    var accountkey = dialog.AccountKey;
});