Why is the same event removed and added on the same object?

[scotch83]

In this method there is a line where we remove an event which is re-added right after...why is that?

XamarinCommunityToolkit/src/CommunityToolkit/Xamarin.CommunityToolkit/Views/TabView/TabView.shared.cs

Line 521 in 299fac6

tabViewItem.PropertyChanged -= OnTabViewItemPropertyChanged;

XamarinCommunityToolkit/src/CommunityToolkit/Xamarin.CommunityToolkit/Views/TabView/TabView.shared.cs

Line 522 in 299fac6

tabViewItem.PropertyChanged += OnTabViewItemPropertyChanged;

[bijington]

We unsubscribe before subscribing again to make sure we don't end up with multiple subscriptions to the same event handler.