有没有可能刷新ICollectionView属性上的getter？

I am working on an autocomplete textbox that has a listbox that will be populated with streetnames from a database based on what the user has entered. When my app is started the getter on my property returns null because the user has not typed anything into the textbox just yet. What I am trying to accomplish is to somehow refresh the getter after the streets have been returned from the api call. I also have an I am working on an autocomplete textbox that ha