New Post: DialogService in WPF apps?

Sending parameters to custom dialogs can be made hugely easier if we have just one more parameter in IDialogService.ShowMessage() call. Instead of:

Task<bool> ShowMessage(string message, string title, string buttonConfirmText, string buttonCancelText, Action<bool> afterHideCallback);

make it:

Task<bool> ShowMessage(string message, string title, string buttonConfirmText, string buttonCancelText, Action<bool> afterHideCallback, object data = null);

Or can you suggest another way of sending an object from ViewModel layer to my custom dialog in View layer?