尝试在WPF应用程序中开始更改属性的故事板

I have a simple MVVM application. It contains a property, which I will change to true when a method correctly executes, and false if it does now. When this property changes, for a few seconds I would like to display "Passed" or "Failed" on the status bar of my WPF application and then have it fade away.I have a simple MVVM application. It contains a