Wpf itemssource binding not updating

The item is deleted from the collection but the List View is not reflecting it.The app has to be restarted to see that the item is deleted.

In the previous article we saw how changes in a Text Box was not immediately sent back to the source.So, I have this WPF datagrid, and it's quite happy in the way it works. Some background, I'm not doing the base behavior for editing/adding, but rather have a separate control outside the grid which is responsible for that behavior (as it is also the control responsible for adding the initial element).But I was having a problem, and it was with the Grid's UI.The first one is set to Explicit, which basically means that the source won't be updated unless you manually do it.For that reason, I have added a button next to the Text Box, which will update the source value on demand.

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